The famous millionaire William was found dead in his own house and the circumstances of his death are very vague. On the eve he had a meeting with the mysterious mistress, and after her departure the owner died. The police, investigating the causes, concluded that the fat cat was poisoned by an unknown poison. But the investigation is marking time, the woman was not found by the relatives of the deceased and they are very unhappy. They want to find the killer and find out the motives of the crime. For this, it was decided to hire private detectives and the best. A group of three detectives arrived at the scene: Kimberly, Sandra and Sydney. You can join the group and help find important clues in Mystery Mistress.