14-year-old Siddharta, wise beyond his age, has to deal every day with his heroin-addict mother Silvia and an absent father. One day, his four-year-old sister Domitilla accidentally pricks her finger on one of Silvia's used needles without her noticing. Seeking advice on the Internet, Siddharta is told to have her tested for hepatitis and AIDS. Thus he embarks on a odyssey of medical bureaucracy and both kind and uncaring adults.
| Actor | Role |
|---|---|
 Valeria GolinoSilvia | Silvia |
 Sergio RubiniMassimo | Massimo |
 Stefano DionisiRoberto | Roberto |
 Niccolò SenniSiddharta | Siddharta |
| FFrancesca Di GiovanniDomitilla | Domitilla |
 Corrado InvernizziLaboratory technician | Laboratory technician |
 Chiara NoscheseGirl at test lab | Girl at test lab |
 Victor CavalloCoso | Coso |
 Maria ConsagraUSL psychologist | USL psychologist |
| GGiuseppe Del BonoToni | Toni |
 Raffaella LebboroniDoctor | Doctor |
 Sergio PierattiniPolice chief | Police chief |
| AAndrea Liu JunyuPaolo | Paolo |
| SSerena ScapagniniFlavia | Flavia |
| BBruno SclafaniMichele | Michele |
 Paolo TriestinoYoung doctor | Young doctor |
 Raffaele VannoliKind nurse | Kind nurse |
 Silvio VannucciUSL doctor | USL doctor |