Second-rate writer Marton spends his not-yet-advanced old age in a luxurious retirement home. Apart from his grandson, who lives somewhere in Australia, he has no one else in the world. His wife left him long ago, but he cannot forget her. He feels he cannot bear the empty, monotonous life among equally abandoned people. He confides in his diary that he will commit suicide in the coming days. But then new guests arrive—the beautiful Mrs. Rouvrová and her disabled husband. A spark quickly ignites between Marton and Mrs. Rouvrová, and suicide is forgotten. But mysterious deaths begin to occur in the home, and soon there is no doubt that they are murders. Marton must ultimately suspect his late love, Mrs. Rouvrová...