A son of a wealthy tycoon died in Edinburgh. His wife found the body on the floor in the bathroom. She woke up alone at night and got nervous, as her husband was absent. Therefore, she started looking for him. Finally, she found a locked door of the bathroom. The wife called her brother for help and the man knocked out the door. Everything seemed to be very simple at first glance. It was an accident. The victim slipped on a wet floor, broke the knee and hit his head. Still, there were several strange details at the crime scene and Inspector Logan's intuition felt suspicion. During the interrogation, the wife and her brother were holding something back, so Logan's suspicions increased. Was it an accident or a cold-blooded murder?