The city police receives a report from the hospital. In the morning, an elderly woman was brought in who had fainted in her apartment at night. Apparently, something scared the woman to death. Patrol Six must obtain more information from the injured party to open an investigation. In a conversation with the police, the woman assures that her apartment is haunted by ghosts. She recently inherited this place from her deceased sister, and strange things have been happening there since the beginning. The sixth patrol, consisting of staff midshipmen Korwicki and Mróz, goes with the injured party and her granddaughter to the apartment. Once there, Marek and Natalia carefully check every corner, but nothing catches their attention. Suddenly, a dull, terrifying sound is heard from the bedroom - something like a muffled howl. The police cannot find the source of the sound.
