Vincent Wu's superpower is knowing the most trivia about superheroes out of anyone else in his school. He is also the leader, along with his friends Max and George, of the unofficial Captain Stupendous Fan Club. So, when Captain Stupendous, the evil Professor Mayhem, a giant indestructible robot, Vincent's parents, and Polly Winnicott-Lee--the girl Vincent has a crush on--all collide together in a big mess, it will be up to Vincent to become a real superhero and save the day.