Five friends who form the "inseparables" group spend an evening having a gargantuan dinner. Returning home, one of them has a heart attack and dies. Soon, however, other friends of the group are also found dead under mysterious circumstances. The journalist Olimpo Lupo of "Resto del Carlino", tasked with following the case, soon becomes passionate about it and turns into a detective.
| Actor | Role |
|---|---|
 Gioele DixOlimpo Lupo | Olimpo Lupo |
 Amanda SandrelliNot listed | Not listed |
 Stefano MasciarelliNot listed | Not listed |
 Pamela PratiNot listed | Not listed |
| EElena D'IppolitoNot listed | Not listed |
 Nicola PistoiaNot listed | Not listed |
 Giampiero BianchiNot listed | Not listed |
 Stefano AntonucciNot listed | Not listed |
 Marina Giulia CavalliNot listed | Not listed |
 Pino AmmendolaNot listed | Not listed |