Fu-Manchu is trapped, cornered in London and cut-off from his resources, including the elixir vitae that grants him eternal life. But under the Thames, the devil doctor practices the dark art of sorcery, and it will be up to Nayland Smith and Scotland Yard to stop him. But Fu-Manchu may possess the key to victory, when he kidnaps Dr. Petrie's wife, Fleurette!

ALSO IN THIS BOOK: The first of three lost novels by Sax Rohmer, starring Fu-Manchu's eternal nemesis, Sir Denis Nayland Smith.