When Boston's most feared super villain Shadow heat her sidekick Acid Cortex decides to be a superhero because of his sisters persuasion who is the most loved super hero Onyx. When Shadow disappears for several years she makes a grand return from her non super form Charlie Keru falls in love with Acid who forgot who Shadow was as a non super. Yet the contract Acid signed is up now she has power again will Shadow let the contract take over or will Shadows emotions control her.