Phoebe and Max are assigned a mission in their new hi-tech beach home base, where their superhero identities remain a secret. They bring Chloe along to help her have a normal life, but the trio must stop the threats of Secret Shores and the true supervillain known as the Mastermind.
A training accident makes Chloe's powers faulty; Max tries to cure her and gets a misleading positive result, so she goes to a party; but his treatment actually creates brand new powers Chloe can't control
Chloe, Jinx and Booch are designing a school mascot, but Max and Phoebe's feud over their jobs ruins the project; Chloe criticizes them, and the twins realize their fighting affects Chloe now that they're guardians.
After Phoebe and Max let Chloe's friends watch a horror movie and eat candy, Jinx and Booch's parents want to meet Chloe's; with Hank and Barb away, Max and Phoebe transform into them to help Chloe; it goes well until the real Hank and Barb show up.
Max bets Phoebe she can't turn off being a superhero and go on a normal date; Chloe helps Phoebe do well on the date, but Max tries to sabotage by crying wolf; suddenly, a real super villain emerges and puts Max and Chloe in serious danger.
Chloe has been missing school by going on missions with her siblings. She now has to go to summer school to catch up on everything she has missed. Max, acting as the substitute for summer school, has a new student who agrees to tutor her.
B.C. invites Chloe to a launch party, and at the same time Jinx and Booch invite Chloe to protest outside the party. Not wanting to hurt anyone's feelings Chloe tries to do both. Pheobe is keeping her working with Captain Perfect a secret from Max.
Upset that Phoebe secretly partnered with Captain Perfect, Max decides to have a new superhero partner, his best friend Gideon. But things go wrong when Max tries to make Gideon a better superhero.
Captain Perfect's younger sister, Penny, is headed down the path of becoming a supervillain. Eager to impress Captain Perfect, Max takes it upon himself to guide her toward a better path.
