Young lawyer Jamie McCallan enlists his sister Ezma and assistant Quinn McLauchlan to travel to Edinburgh to investigate the financial affairs of the father of his ex-fiancée Catriona McNair. Catriona suspects that her father is ruined. McLauchlan will play the role of his brother Augustus, who left for Jamaica, and Ezme - his wife. Both will live in Augustus's house and will pay visits to the McNairs. Ezme is a strict and virtuous girl, and Quinn, although he has the reputation of a rake, whom his family has turned away from, has already proven many times that he can be trusted. The lawyer is absolutely convinced that the sister’s honor will not suffer, but her confidence is weakening day by day...