Drug addict Maggie Hayward's consistent violence, even in police custody, ends in the execution chamber. However, top-secret US government agent 'Bob' arranges a staged death, so Maggie can be elaborately trained as a killer. She gets a new cover identity as saleswoman Claudia Anne Doran. She also finds a house-mate, building super J.P., a broad-minded, gentle photographer. The two fall in love, and that complicates her government assignments. His influence extends to breeding in her a conscience that supplants her violent tendencies and desire to continue work for the agency.