Eva is a young agent in the robbery bureau of the Catalan Police Department who is recruited to hunt down a serial who has been murdering old ladies. The young agent, a single mother of a six-year-old boy, must reconcile the capture of the killer with her obligations as a mother, while at the same time confronting Chief Inspector Xavier Vidal, the man who had always barred her from entering the homicide bureau.—Oberon Cinematogràfica