Charles sent in Egypt after the War. He immediately meets a girl named Sophia. New friend was born and raised in a noble and wealthy family by the name of Leonids. Between the protagonist detective \"Crooked House\" gradually begin a romantic relationship and affection. Time passes and the sweetheart retired military time to get back to his native England. Loving couple continues to keep in touch by exchanging letters. Their correspondence lasted for two years. The hero does not maintain separation and rides in the UK for the beloved. He is going to meet with her family and receive the blessing of her father at the wedding.
However, the joyful and the long-awaited meeting marred by the death of his grandfather. The man was a wealthy businessman with a great influence in the country. The family doctor said that the death of an old man was provoked the replacement of ampoules of insulin on the poison, because the deceased had suffered from diabetes. All charges are his young wife became already a widow. In the course of the investigation it is revealed that the woman had a love affair with the teacher Leonidsa grandchildren. For further investigation, the family invites his father Charles-an experienced detective. Now the hero will join the family circle to look at every resident of the home, because it is under suspicion are all.