Vincent Wu is Captain Stupendous's No. 1 Fan, but even he has to admit that Captain Stupendous has been a little off lately. During Professor Mayhem's latest attack, Captain Stupendous barely made it out alive, although he did manage to save Vincent from a giant monster robot. It's Vincent's dream come true...until he finds out Captain Stupendous's secret identity: It's Polly Winnicott-Lee, the girl Vincent happens to have a crush on.
Captain Stupendous's powers were recently transferred to Polly in a fluke accident, and so while she has all of his super strength and super speed, she doesn't know how to use them, and she definitely doesn't know all the strengths and weaknesses of his many nemeses. But Vincent and his friends are just the right fan club to train up their favorite superhero before he (she?) has to face Professor Mayhem again. And if they make it through this battle for the safety of Copperplate City, Vincent might just get up the courage to ask Polly on a date.