When young suburbanite Penn Zero unexpectedly inherits a job that most kids could only dream about having -- being a superhero -- he jumps fully into his new, part-time duties. He still has to live his normal, everyday life, which includes going to school, but after school is when the fun begins. Penn teams up with sidekick Sashi and wise man Boone as their adventures take them all over the place, from outer space to the Old West and the biggest challenge of all: suburbia. The ultimate goal for Penn and his team is to defeat evil Rippen and save the world.