It's 1742 in Paris, France. Louis XV is still king of France. A woman was found dead in a coffin floating in the Seine River. The brother of the deceased woman is D'Eon, who is determined to find the murderer of his sister: Lia. But as D'Eon investigates and tracks down the killer. He soon discovers that strange and supernatural things are involved with this series of killings. And only he can avenge Lia's death. As evil lurks in the palaces of the royal and the dark side of Europe.