Loosely inspired by the real life of star Marlon Wayans, this update to the classic family comedy centers on a loving (but immature) father committed to co-parenting his two kids with his very-together ex-wife. While his misguided fatherly advice, unstoppable larger-than-life personality and unpredictable Internet superstardom might get in the way sometimes, for Marlon, family really always does come first - even if he's the biggest kid of all.
Marlon convinces Ashley to let Zack model for a kids' athletic line after he is approached in a mall. After the shoot, Stevie , Yvette , Marlon and Ashley are horrified to see that the photos have been altered as the shirt he is modeling now contains the phrase "Funky Monkey." Ashley and Marlon decide to pull Zack from the campaign after the advertising executives fail to see the racism of the shirt.
Marlon offers to be Ashley’s wingman during a night out at a club. All is going well until Marlon meets someone and Ashley finds herself jealous. Yvette gives Stevie a makeover and kisses him in an attempt to make her ex jealous.
When Marlon’s sisters come to town, he convinces Ashley to pretend they are still married in order to keep them from freaking out and being disappointed in him. As the weekend goes on and the charade gets harder to keep up, Marlon finally confronts them in an epic confession. After receiving a psychic reading from Lenora, Stevie tries to woo Yvette as he thinks they are destined to be together.
Marlon and Ashley go to see strong-willed relationship therapist Kamala to help stabilize their rocky divorce. When Marlon exposes Kamala as a fraud, he ends up experiencing a breakthrough and realizes he should try and change his ways. Stevie gives Yvette an intense massage.
Marlon decides to buy the house he has been renting since the separation. While prepping for the sale Marlon and Ashley decide that they no longer have to follow the politics of marriage and tell white lies to keep each other happy. They can be totally honest with each other.. "Keep It 100." Yvette and Stevie get involved and the plan eventually backfires when they realize you can be too honest. They all agree to keep it a balmy "77" with a slight breeze.
Marlon and Stevie see Yvette's fiancé, Demetrius, cheating on her and they disagree whether or not they should tell her. Marlon refuses, claiming they can't break the "man code." Ashley deals with Yvette's new relationship by turning to numerous hobbies. Yvette discovers what is going on and breaks up with Demetrius after he and Marlon get into a fight at her engagement party.
Marlon, Stevie, Yvette and Ashley all attend homecoming weekend at Howell University. Stevie is determined to join the independent fraternity that Marlon created because Stevie was always blocked from membership as an undergrad. Ashley and Yvette get caught up with a couple of young co-eds.
Marlon wants Marley to get her driver's license, but when he finds out that she's scared of driving, Marlon shows her how to face her fears by facing one of his own; meanwhile, Stevie helps Yvette boost her low passenger rating on a ride-hailing app.
Marlon crashes career day at Zack's school so he can tell the kids about non-traditional careers like his own, but when the students misunderstand his advice and their parents get upset, Marlon must make things right.
Marlon goes all out for his 43rd birthday and decides to throw himself a funeral party after attending his barber's funeral. Everyone speaks at Marlon's party, talking about all the insensitive jokes he made at their expense. This makes Marlon worry that he is too harsh on everyone. They reassure him that they love him and know that even when he is making fun of them it's because he cares.
Exes Marlon and Ashley try a friendly divorce for their children's sake, but things get tricky when Ashley decides to date again. In other events, Marlon struggles to keep a sponsor for his online channel, “The Marlon Way.”
Ashley is shocked to learn that Marlon has a storage unit crammed full of things from when they were married and challenges him to have a yard sale to part with it all.
Marlon struggles to come to terms with his daughter bringing home a boy for the first time. Yvette uses Stevie to get great seats to a Beyoncé concert.
Marlon and Ashley contemplate whether to have no strings attached 'ex-sex.' Yvette babysits Marley and Zack.
Feeling that Marley and Zack don't appreciate everything they have, Marlon teaches them a lesson by recreating the projects from his childhood.
Marlon is stunned to learn that Ashley is treating herself to breast augmentation surgery for her birthday, her first since their divorce. In other events, Stevie tries to guess Yvette's age.
Marlon and Ashley have very different ways of coping when Zack needs surgery.
Marlon's lack of boundaries leads Ashley to ask for his key to her house back; and Marlon coaches Zack's basketball team.
Marlon believes he can act appropriately to help Ashley get into an exclusive social club that prefers couples; and Yvette is shocked to learn that Stevie fits in perfectly among the bourgeois clientele at the club.