Chloe's birthday party is cancelled, and Max and Phoebe compete to throw her a new one; when Max's time-stopping birthday gift falls into the wrong hands, he must work with Phoebe to stop some party poopers from ruining Chloe's birthday.

When The Mastermind forces Chloe to steal a magical amulet that grants him superhero powers, the Thundermans unite to stop his plan. Chloe must reveal her identity to save her friends.