After time, what remains in the journey of a relationship that is on its way to its end? A final conversation will always be missing while crossing the tunnel before reaching the end.

A dinner takes place at the home of a prominent businessman. The assistants, 3 couples︎: the businessman and his wife, his best friend and his wife, ︎his partner and his wife. The "rules of the game" are very clear. A closed stage︎: the house. A murder︎: that of the businessman. Five suspects: all with apparent motives to commit the crime, and a detective to make sense of the pieces and find the culprit. Through the interrogations with each of these five murderous candidates, the reconstruction of what happened that night will gradually put on the table the letters of a swing of forbidden relationships, complexes, disagreements, envy, jealousy and shady deals.