A microcosm of people lost in search of an artificial happiness, which leads them to steal and prostitute themselves for the short ecstasy of a squirt of heroin in the veins. Marco and Pina live in this world of drugs, prostitution and violence, and they must fight for their survival. One day one of their friend dies during a holdup. Marco and Pina are helpless and will do anything to escape, but fate does not want a similar world. Between bites of heroin and sidewalk they are in a deadly trance.
| Actor | Role |
|---|---|
 Helmut BergerMarco | Marco |
 Corinne CléryPina | Pina |
 Marzio HonoratoToby | Toby |
| AAgnès NobecourtMarina | Marina |
 Karl ZinnyAngelo | Angelo |
 Franco CittiAlfredo | Alfredo |
 George ArdissonTrafficant | Trafficant |
 Francesca CiardiPusher | Pusher |
 Antonio BuonomoNot listed | Not listed |
 Lorenzo PianiNot listed | Not listed |
 Aldo Bufi LandiNot listed | Not listed |
 Roberto CaporaliNot listed | Not listed |
 Claudio ZucchetDetective (uncredited) | Detective (uncredited) |
 Francesco D'AddaFirst Client (uncredited) | First Client (uncredited) |