Max pretends to turn evil to infiltrate Mastermind's henchmen and steal the Chip-Chucker, a device that previously turned him evil.
Chloe must attend summer school, and Max is assigned to be her teacher. While they will be busy all summer, Phoebe decides to go solo on missions. She meets a new superhero named Captain Perfect, and discovers they make a good crime-fighting team.
Max learns that Phoebe is working with Captain Perfect, and sets out to uncover the secret he is keeping. Chloe's crush invites her to a product launch party at Splat By The Sea, at the same time Jinx and Booch want her to protest outside the party.
Upset that Phoebe has a new partner, Max decides to partner with his friend Gideon. But things backfire when Max tries to turn Gideon into a supersized superhero. Chloe's friends pretend to be wealthy so they can bond with her new crush.
Max agrees to mentor Captain Perfect's younger sister, who is headed down the path of becoming a supervillain. But he has his hands full when she tries to become one of Mastermind's henchmen. Phoebe tries to help BC ask Chloe to the school dance.
Max and Phoebe are working well as a team, until he is accused of committing crimes and Phoebe must apprehend him. Now on the lam, Max learns that the Mastermind's henchman is secretly controlling his actions via a chip in his neck.