The body of a young woman was found near the coastal rocks. Everything points to an accident, but the police do not rule out that a cold-blooded and carefully planned murder took place. Suspicion falls on the relatives of the deceased - each of them had their own motives. And, of course, everyone denies their guilt. At the same time, the famous police inspector Moresby and journalist Roger Sheringham take on the investigation. Which of them is destined to win and be the first to unravel this case? Detective author John Hillyard organizes a performance in his house. The actor who played the role of the victim is soon actually killed - and in exactly the same way as it was shown on stage... The writer himself is under suspicion. He has no choice but to turn to his old friend Roger Sheringham, the famous amateur detective, for help. Trying to drop the charges against Hillyard, Sheringham realizes that this case is much more complicated than it might seem at first glance. Will he be able to save his friend and accurately identify the killer? After all, literally each of the guests had a good reason for wishing the deceased to die...