Inspired by the novel "Tenebra" by David Pratelli, the film revolves around a mysterious killer who begins killing women and leaves a message: This is my revenge.

A womanizing lawyer follows his wife and son to a trip to Egypt in a last-ditch effort to make up for his infidelities. Also travelling to Egypt is a bumbling police chief who's desperate to keep his rebellious daughter from becoming a showgirl. The two meet during a Nile cruise. Calamity ensues.

Shortly before the premiere of the play, quarantine is announced and four actors: Chiara, Giorgio, Antonio and Valentino find themselves in isolation. In moments of despair, when they return to the mistakes of the past and test the strength of relationships, they may feel that madness is the only way out.

A man with a fragile state of mind will battle with his past in the effort to understand who he has become and which actions he thinks to have committed.