Lock Dawn estate. Cowen-Erskin B.

Scotland, 30s of the last century. For more than 600 years, the Inverkillene clan has been living in the clan estate for more than 600 years. The state of the family was significantly diminished over the past centuries, and they are forced to engage in aristocrats unworthy of affairs: to sell salmon and produce crazy whiskey. Only none of this helps, and to top it all in the river find the body of the 19th graph with a broken head.

The investigation is entrusted to the unlucky inspector Jarvis, who quickly write off what happened for an accident. After all, there are no crimes in small towns, only fights in pubs. The only one who does not agree with such a conclusion is Mrs. McBein's observational housekeeper. She knows much more secrets of a noble family than anyone else. She is sure - the murder happened and the killer is hiding in the house of everyone in sight.