Little Luigi, the son of Guido and Elena, has a strange illness. To save him, they must inject his blood into a healthy person with his same blood type in order to create antibodies the fight off the infection.
| Actor | Role |
|---|---|
 Pierre CressoyGuido | Guido |
 Milly VitaleElena | Elena |
 Frank LatimoreReder | Reder |
 Aldo SilvaniDott. Martini | Dott. Martini |
 Maria Laura RoccaAnna | Anna |
| GGianfranco NicostraLuigino | Luigino |
| OOscar AndrianiCommissario | Commissario |
 Bianca DoriaAgnese Reder | Agnese Reder |
 Liliana BonfattiInes | Ines |
 Gino SinimberghiCantano | Cantano |
| OOrnella MoscucciCantano | Cantano |