Rista, a clumsy genius mechanic, is thrust into action when a rival named Frezero hijacks the city's security robots. Aided by her associate Curie, Rista must battle a series of perverse machines equipped with aphrodisiacs to reclaim the hijacked radio towers. Despite the chaotic and suggestive nature of the attacks, Rista uses her mechanical skills to overload the robots and restore order to the city.
While attempting to secure a radio tower, Resta and her companions face off against a series of depraved robotic enemies. After surviving a chemical attack from a perverted machine and receiving intimate help from Kurie to recover, Resta must overcome a slime-like robot capable of absorbing her energy attacks. Despite their victory, a mysterious foe looms in the shadows, preparing a powerful weapon for their next encounter.