An inexhaustible topic is heirs and inheritance, as well as those who find themselves close to luxury. Wealth is always a provocation for people who are unlucky enough to fill their pockets, but it is not always the goal of a criminal. Sometimes wealth blows the minds of the heirs, changing their human appearance into something infernal that defies reason. And then the opposite laws come into force. Three fathers who lived in different eras, the fates of their children, mistakes and repentance, hatred and resentment, duty and responsibility, greed and vindictiveness - this is what the novel “The Heir from Siam” is about. And everyone hoped to solve their problems through inheritance - legal and illegal. This is the fifth novel about Sofia and Grandmother Margot, who lived in the nineteenth century and found her place in the police, becoming a secret agent for the head of the investigation.