The film follows an unnamed young woman (Loredana Cannata) who lives a completely compartmentalized existence. By day, she is an ordinary worker, but by night, she adopts the persona of a predatory seductress ("La donna lupo"). She roams public places—train stations, hotels, and dark movie theaters—engaging in intense, short-lived sexual liaisons with strangers, changing her name for each man. Among her conquests is a married man (Pascal Persiano) and a young student named Valerio (Arturo Paglia). When Valerio falls deeply in love with her and tries to break through her emotional defense mechanisms to build a real relationship, she resists his possessiveness, unwilling to give up her total sexual freedom and anonymity.