The series revolves around social outcast Scott McCall, a high school student living in the town of Beacon Hills. Scott's life drastically changes when he is bitten by a werewolf, becoming one himself. He must henceforth learn to balance his problematic new identity with his day-to-day teenage life. The following characters are instrumental to his struggle: Stiles, his best friend; Allison, his love interest who comes from a family of werewolf hunters; and Derek, a mysterious werewolf with a dark past. Throughout the series, he strives to keep his loved ones safe while maintaining normal relationships with them.
When Lydia goes missing from the hospital, werewolves and hunters alike begin a search to discover not only where she is, but what she's become.
The night before the new full moon, Isaac's father is murdered. When he's taken into custody, Scott, Stiles and Derek resolve to break him out before the Argents get to him first and before the newly bitten teen turns into a werewolf.
Scott tries to keep Derek from creating new werewolves; Argent officially begins Allison's training; the new creature in town takes another victim.
The new shape-shifter strikes again, and Scott recruits a reluctant Allison to acquire a rare book in Gerard's collection.
Derek believes that Lydia is the shapeshifter they are after; Scott gathers forces for protection.
With startling new information about the shapeshifter, Scott and Stiles hurry to protect their friends while Allison is given an investigative task by her family.
As Lydia begins to make connections about the bite from Peter, Jackson causes new problems for Scott and Stiles while Derek has a crisis of faith in his leadership as a new Alpha.
Chris, Scott and Stiles struggle with how to stop the Kanima; Scott and Stiles plan to trap the Kanima at a warehouse party, where Erica will also be present, while Allison's mother plans to take Scott down. Chris and his team of hunters face Derek in a confrontation.
Even as his relationship with Allison becomes further strained, Scott and Stiles must attend Lydia's birthday party while Derek locks his new wolves up to watch after them on their first full moon together.
Allison tracks Derek to the sheriff's station, where Scott, Stiles, Melissa and Sheriff Stilinski are being held hostage.
Scott plays in the championship lacrosse game and must also figure out a way to stop Gerard. Meanwhile, Allison continues her hunt for Derek and his wolves.
Scott races to uncover Gerard's master plan following a shocking death on the lacrosse field. Meanwhile, Derek plots to take Gerard down using his own methods.
With graduation approaching, a supernatural force rides into Beacon Hills and crosses paths with Scott and his friends, while Liam discovers evidence of a new enemy in the high school.
While Scott, Lydia and Malia search for lost memories of a missing friend, Corey discovers a connection between his abilities and the Wild Hunt.
Scott, Lydia and Malia search for Stiles; Liam and the others throw a party in order to keep a friend safe from the Ghost Riders.
Scott, Liam and others protect the lacrosse team from an attack by the Ghost Riders; Chris and Malia protect those marked by the ghost riders and Lydia looks for clues to help find Stiles.
Trapped inside the Wild Hunt, Stiles reunites with an unexpected ally while Scott, Lydia and Malia discover Stiles's Jeep may be connected to his disappearance.
Scott, Lydia and Malia search for clues about the Wild Hunt in a mysterious place called Cannan while Liam and and Hayden take drastic measures in the fight against the Ghost Riders.
Scott and Liam make an attempt to capture a Ghost Rider; Malia and Peter try to find a way into the Wild Hunt.
Scott, Lydia and Malia decide to storm the rift and rescue Stiles; Liam, Hayden and Mason make a deal with Theo to learn Douglas' plan.
Scott, Lydia and Malia desperately enact a plan to remember Stiles while Liam and Theo act as decoys.
The fate of Beacon Hills hangs in the balance as Scott and his pack face off against Douglas in a final showdown.
As Scott prepares Beacon Hills for his imminent departure, a mysterious presence breaks out of Eichen House.
Scott and Malia search for the owner of a bullet, worried that a new werewolf hunter has come to Beacon Hills; Lydia must face her fears of Eichen House.
While Scott and the others desperately pursue a missing werewolf, Melissa and Argent investigate the nature of a strange body.
Scott, Lydia and Malia take drastic measures to quell the rising violence in Beacon Hills. Liam has a gauntlet to endure at the high school.
When Scott and the others struggle to protect two new werewolves, an unlikely ally joins in the fight.
Liam and Theo try to draw the hunters away from Beacon Hills.
The pack reels after a shocking attack. Scott tries to recruit reinforcements.
Scott and the others must make a discovery before it’s too late.
Scott and Malia prepare for battle while Argent searches for an old ally.
When Scott suffers a werewolf bite, his strange new abilities begin to complicate his life - and his relationship with the new girl in town.
Scott struggles to balance his new life as a werewolf and the pressures of being a teen, all while avoiding werewolf hunters and trying to score a second date with Allison.
Scott and Allison end up in a group date; an animal attack has Stiles' sheriff father on the lookout.
A new hunter comes to town and shoots Derek, who is certain to die unless Scott can find the right kind of bullet that caused his injury.
There's another animal attack involving Lydia and Jackson, raising more questions about wild animals. Meanwhile, Scott and Allison skip school and Derek must deal with the werewolf hunters on his own.
Scott tries to control his transformation so he can spend more time with Allison. Elsewhere, Derek continues trying to make an ally of Scott.
Scott and the others are trapped inside the high school as the Alpha draws near.
The hunt is on for Derek's whereabouts, meanwhile Stiles tries to help Scott with controlling his transformation when a second full moon is approaching.
Jackson seeks out a specialist regarding the wound on his neck.
Scott moves to protect his friends from the Alpha, meanwhile Stiles makes a discovery about Derek's family.
While Derek is still stuck in captivity, Scott's true identity might become public information.
Caught in a war between hunters and werewolves, Scott seeks help from friends and enemies.
When one of their friends goes missing, Scott and the pack travel into Mexico on a search and rescue mission.
Anxious to put an end to Kate's plan, Scott must team up with an unlikely ally to accomplish the task.
A new Freshman player jeopardizes Scott's position on the Lacrosse team; Stilinksi investigates a savage murder.
On the night of the full moon, uninvited guests turn up at Lydia's lake house; Derek pursues a killer.
Scott, Stiles and Kira participate in their first Lacrosse game; Lydia looks to get help controlling her powers.
Scott is forced into helping a dangerous enemy; Derek and Malia track an old ally.
The school is overtaken by a mysterious outbreak.
Scott embarks on a dangerous plan to draw out The Benefactor; Malia confronts her past.
Scott and Liam are targeted by an assassin during the lacrosse team's annual bonfire; Lydia discovers a family secret.
Scott and Kira must protect Satomi's pack from assassins; Stiles and Malia learn the origins of The Dead Pool.
Scott and his Pack begin a dangerous battle against an old enemy.
In order to save the pack from Kate, Scott and Stiles return to La Iglesia.
Derek and Isaac search for Erica and Boyd, and a new wolf pack arrives in town with its own menacing Alpha.
One of Stiles' childhood friends goes missing, Scott begins his new fight against the Alpha pack, Lydia and Allison investigate a new mystery, the alpha pack reaches out to Peter and the werewolf hunters begin to recruit after the alpha pack kills one of their own.
Boyd and Cora are under the influence of the full moon; Scott and Derek seek help from an unlikely ally.
Scott tries to keep Isaac from confronting the twins in school; Stiles tries to prove his theory about the killings.
During a bus ride to a cross-country meet, Scott and his friends flash back to the events of a pre-emptive strike against the Alphas, which has left several injured and possibly one or more dead.
Scott and the others suffer strange experiences while stranded at a motel; considering the killer's newest targets.
The Darach targets Deaton as the next sacrifice, leaving him hanging by his wrists to die. Kali and the twins go after Derek.
While looking for answers, Scott, Allison and Stiles hear stories told by two unlikely narrators and discover a secret about the color of a werewolf's eyes.
Allison suspects that someone close to her is involved with the murders; Scott and Stiles want to use Lydia's talents to solve the murders.
Trapped by a storm in a hospital, Scott and Derek must defend themselves against the Alphas; saving Cora's life.
Scott must make a difficult choice to save friends and family; Derek and Peter contemplate a way to save Cora's life.
Scott and his friends use an ancient ritual to save the lives of their loved ones and stop Deucalion.
Scott, Stiles and Allison suffer side effects from the ritual sacrifice; Sheriff Stilinski searches through old cases.
Scott and his friends ponder catching the werecoyote before it is hunted down; an unlikely ally helps Derek and Peter break out.
William Barrow, an electrical engineer turned mass murderer, escapes during surgery and hides out in the school.
Beacon Hills is under curfew from the power outage; the teens throw a blacklight Halloween party; Scott tries to earn Kira's trust.
Scott's friends pledge to protect him; Argent, Isaac and Allison search for answers;Stiles may be the dark spirit the oni seek.
Stiles goes missing; Scott and the others set off on a search; Lydia tries to master her new abilities.
Scott and the others try to prevent a disaster; Lydia and Allison seek out an unlikely teacher. Stiles is still possessed by the nogitsune.
Stiles has to make an important decision over Eichen house. Scott and his friends seek out an important Japanese artifact.
An important clue is revealed in the story of a World War II internment camp; Kira's role is more crucial, and she discovers unusual abilities.
Scott and Lydia combine abilities in an attempt to gain the upper hand; Stillinski's future will be decided by a review board.
Kira finds herself facing an unexpected antagonist; Scott and his friends try to survive against an enemy growing ever stronger.
One last stand is made by Scott, Derek and their allies.
It's the eve of senior year and Scott and his pack deal with the arrival of a new enemy and the return of an old friend.
Stiles tries to prove his suspicions about a new classmate while Lydia helps a student with night terrors.
Scott tracks a dangerous new shapeshifter threatening Stilinski. Malia receives information about her mother's identity.
In hopes of learning more about the Dread Doctors, the pack goes into Eichen House.
Scott and his friends experience strange effects after following Dr. Valack’s advice.
Stiles is suspicious about a new girl showing up and what her intentions are. Scott's plans to protect the newest victim are derailed when The Dread Doctors attack.
Scott finds himself turning to an unlikely ally for help. Stiles and Lydia attempt to find out the truth about Parrish.
Scott and his friends have to deal with what could be their biggest threat yet.
Scott and Stiles try to learn what is behind the mysterious infection that is killing the town sheriff.
Even without the support of his pack, Scott considers what the Dread Doctors' success means for Beacon Hills.
Kira and her mother make a journey to help Kira deal with her dark side. Meanwhile, Lydia is surprised at Eichen House.
As Scott tries to put his pack back together. Meanwhile, Malia and a new ally set out to rescue Deaton from The Desert Wolf.
Upon learning that Lydia is in danger, Stiles makes a plan to break her out of Eichen House; Theo has his own plans.
While trapped in Eichen House with Theo and the Chimera pack, Scott tries to rescue Lydia before time runs out.
Scott and the pack use a charity lacrosse game in a ploy to learn the identity of the Beast.
Scott, Stiles, Lydia, Malia, and Liam are trying to figure out how to defeat the Beast of Gévaudan that the Maid of Gévaudan, Marie-Jeanne Valet, faced in 1765. As Gerard Argent, recounts Valet’s story to Scott’s pack in hopes they can deduce the creature’s weaknesses.
With the identity of the Beast finally revealed, Scott and his friends are in a race against time to stop The Dread doctors from implementing their final plan.
Loyalties are tested and new alliances forged as Scott and his friends work to stop the Beast before Beacon Hills is razed to the ground.
Stiles tries to track down a fugitive. Liam tries to play wingman to Mason at a nightclub.