An unemployed sailor gets a job at the yacht of a wealthy man, where he is tortured by his beautiful young wife and decides to leave his wife and son to leave with her.

A party of couples from Athens is planning to attend the performance of Medea in Ancient Epidaurus. They set off in their cars bright and early in the morning, combining their theater outing with a side trip to Nauplion. They stop at a railroad junction for the train to pass. There Mado recognizes the fleeting figure of the man standing at the window of the train and she faints.

A new and rich heir, Anna Margot, is receiving threatening phone calls from an old friend, Anna not knowing what to do requests the help of her friend Tonis Karzis, the anxiety will culminate as a series of unexplained murders follows .