A mystery film is being shot in Galaxy. The protagonists are twelve-year-old Petros and the famous actress Psaropoulis. In the film, "grandmother" and "grandson" live alone. In real life, the old actress is jealous of Petros and Petros can't stand the old woman.
They clash. The other actors and the crew watch their conflict anxiously.
How can the filming of the movie end smoothly if the two protagonists don't reconcile?
Another mystery may help in this reconciliation: the head of the ancient Maiden...