For the first time ever, Matteo has cheated on his wife Mara, who is on vacation, and spent a night of wild, steamy sex with Angela, whom he recently met by chance. He awakens with a headache and a satisfied memory of the night. But a message from the wife tells him that she is coming back home because of a hitch and leave him prey to panic. He tries to hide every trace of the adultery but, plagued by guilt-feelings and fear of being caught, enters into a paranoiac spiral, and his clumsy attempts to fix things only manage to create more damage.
