Penn Zero: Part-Time Hero follows Penn Zero and his best friends Sashi, an overqualified part-time sidekick, and Boone, an under-qualified part-time wise man, as they zap to other dimensions to fill in for heroes in need. Each mission takes the team to unpredictable epic worlds where they must battle evil part-time villain Rippen and his part-time minion, Larry. Whether superhero, fish-prince, clown cop, giant monster or tiny action-figure, Penn uses his unconventional heroic skills to save the day - his own way.