Harry Houdini and Pinkerton detective agency operative Phil Beaumont, hired by the great magician to protect him from a criminal rival named Qin Su, arrive at an ancient English estate. Here Houdini meets another celebrity - Sir Arthur Conan Doyle, the world famous author of detective stories. When the castle owner's father is found murdered in a locked room, Houdini, Doyle and Beaumont decide to take on the challenge of Qin Su, a great master of transformation. Who will solve not only this mysterious murder, but also the mysteries associated with it?..