The Hero Factory is a place where the most advanced and skilled heroes of the universe are built with one purpose - to save the world from evil.

When rookie Rocka responds to a distress signal sent from Aldous Witch, who has crash-landed on a far-away planet, he suddenly goes missing. Stormer, Furno, Nex, Bulk and Stringer are sent to find him, only to discover that Aldous Witch has transformed into the evil Witch Doctor, and that he has transformed a once beautiful planet into a deadly wasteland set on destroying everything on it... including the Heroes.