The annual Star Planet Technology Exhibition grandly opens. At the exhibition, an energy stone containing immense power attracts attention from all sides. Upon learning the news, Big Monster and Little Monster command monsters to wreak havoc and steal the energy stone. In this moment of crisis, the Happy Heroes Alliance gathers to launch an attack and engages in fierce combat with the monsters. However, due to Happy Superman’s impulsive actions, the superheroes lose their superpowers one by one. How will they reclaim their abilities and protect Star Planet?