Maria, a provincial Polish girl, travels to Milan to pay her older sister Eva a surprise visit. The sisters haven't seen each other in seven years and Eva has changed a lot. She lives in a luxurious apartment and dresses in designer clothes. Although she pretends to be an interpreter, Eva is actually a call-girl and, one night, fails to return from an appointment. Maria enquires at the hotel where Eva last worked. Eva's body is soon found. The investigation is conducted by Inspector Messina, a trendy cop. Maria and Messina become an inseparable investigating team. Maria poses as a call-girl in order to reveal her sister's killer and they use mobile phones to keep in touch.
| Crew | Umberto De Luca | Stunts |
| Directing | Ulla Bomser | First Assistant Director |
| Production | Cinzia Leoni | Unit Manager |
| Sound | Gianluca Podio | Conductor |
| Camera | Giovanni Gebbia | Steadicam Operator |
| Camera | Roberto Calvi | Camera Operator |
| Production | Franco Mancarella | Production Manager |
| Art | Gianni Ravagnani | Set Decoration |
| Editing | Sergio Montanari | Editor |
| Writing | Enrico Vanzina | Story |
| Sound | Natale Massara | Conductor |
| Camera | Emilio Lari | Still Photographer |
| Art | Miriam Fischer | Assistant Production Design |
| Costume & Make-Up | Nicoletta Ercole | Costume Designer |
| Production | Giovanni Di Clemente | Producer |
| Writing | Carlo Vanzina | Screenplay |
| Sound | Marco Streccioni | Sound Mixer |
| Costume & Make-Up | Immacolata Costanza | Seamstress |
| Sound | Domenico Pasqua Di Bisceglie | Sound |
| Directing | Nicola De Orsola | Second Assistant Director |
| Lighting | Domenico Cavaliere | Gaffer |
| Production | Paolo La Torraca | Production Secretary |
| Camera | Franco Mele | Assistant Camera |
| Costume & Make-Up | Elena Barosi | Makeup Artist |
| Writing | Franco Ferrini | Story |
| Lighting | Piero Duccio Mascherpa | Gaffer |
| Sound | Danilo Moroni | Sound Mixer |
| Sound | Massimo Anzellotti | Foley Artist |
| Production | Paola Mongini | Publicist |
| Editing | Maria Gianandrea | Assistant Editor |
| Camera | Luigi Kuveiller | Director of Photography |
| Editing | Roberto Gianandrea | Assistant Editor |
| Costume & Make-Up | Patrizia Baiocchi | Assistant Costume Designer |
| Camera | Mario Tessarin | Key Grip |
| Production | Marco Sanguinetti | Production Secretary |
| Costume & Make-Up | Emilio Romano | Hairstylist |
| Editing | Gianni Cerniglia | Color Timer |
| Directing | Patrizia Schiatti | Second Assistant Director |
| Costume & Make-Up | Vincenzo Cavicchi | Hairstylist |
| Writing | Enrico Vanzina | Screenplay |
| Sound | Marco Streccioni | Sound Recordist |
| Camera | Simone De Rosa | Assistant Camera |
| Crew | Federica Della Martira | Stunts |
| Sound | Marco Streccioni | Sound Engineer |
| Sound | Brigitta Pasquadibisceglia | Boom Operator |
| Art | Giuseppe Mancarella | Props |
| Writing | Franco Ferrini | Screenplay |
| Writing | Carlo Vanzina | Story |
| Directing | Carlo Vanzina | Director |
| Production | Diana Di Michele | Administration |
| Costume & Make-Up | Carla Rita Pons | Seamstress |
| Sound | Pino Donaggio | Original Music Composer |
| Crew | Marco Stefanelli | Weapons Master |
| Directing | Martina Monicelli | Continuity |
| Camera | Vachi Mallaby | Steadicam Operator |
| Art | Tonino Zera | Production Design |
