Patrizia and Roberto, theatrical actors and spouses, after having stayed at the Play Motel, accidentally find a body in the trunk of their car. They leave the car at the scene and go to call the police, and when they arrive, they discover with amazement the removal of the body, which is then found in a completely different place: the police then discover that it was Maria Luisa Longhi, wife of Commendator Rinaldo Cortesi. At the request in particular of Patrizia, the two spouses improvise as investigators to help the police solve the case.