An archaeological expedition brings back to London the coffin of an Egyptian queen known for her magical powers. Her spirit returns in the form of a young girl and strange things start to happen.
Lord Southmere escapes from China with a microfilm of the formula for the mysterious "Lotus X", and is captured by Chinese spies who have been instructed to retrieve the microfilm from him....
A wealthy London-based shipping magnate is blackmailed by an evil dentist which threatens to reveal an old case of fraud, while the dentist himself is threaten by a mysterious masked man.
In 1907, an actor is invited to perform in an isolated country house, and becomes involved in mysterious and dangerous events.