Toni leads a normal life with his wife Paola but full of enthusiasm and passion. The chance meeting with the young and wealthy Chiara will rekindle in him the desire to redeem himself and to realize his secret dream: to become an artist. The paths of the three will intertwine in a dangerous love triangle that will change the course of their lives forever.
1960s, the city of Clerville. The forthcoming visit of heiress Eva Kant, who'll be bringing a famous pink diamond with her, catches the attention of Diabolik, the infallible and elusive thief whose real identity is unknown: while trying to steal the jewel, he finds himself bewitched by Eva's charm, a feeling she may be reciprocating. But the police, led by Inspector Ginko, is rapidly closing in on him...