Death is always tragic! A young woman dies of a heart attack. This is the medical diagnosis. The question is closed. But the funeral did not take place. The corpse disappeared. The deceased's husband is in a panic. The investigation has begun. An experienced investigator is assigned to a more than strange case. But the more he delves into the details of the story, the more difficult the tangle becomes. All suspects have an ironclad alibi. The detective comes to the conclusion that the doctors were mistaken. It's about murder. His suspicions are confirmed. Reality reveals to the investigation a picture of a terrible, insidious crime.