The former protector of Secret Shores arrives at the Thundermans' beach house and reclaims it as his home; Phoebe, Max and Chloe try to reason with him, but when a protest at the school goes wrong, the former hero proves more harmful than helpful.

Chloe struggles with her leadership skills; when a villain attacks her school field trip, Max and Phoebe have to put Chloe in charge while they try to take down the villain and defuse his dangerous astronomical weapon.