The fourth book in the series “Investigations of the private detective Maxim Omsky”. Andrew Campbell, Scottish Esquire, dies at a respectable age in his castle. However, his eldest son Archibald suspects that his father did not die of his own free will, and insists on a forensic examination. It is revealed that Andrew died from an overdose of heart medications. The police investigation concludes that the old man committed suicide. But Archibald does not agree with the police’s conclusions and hires a detective to find out the cause and find the true culprit in his father’s death. Maxim Omsky, a private detective, understands the difficult Scottish case.