When John Mannering - alias the Baron - agreed to buy some jewels on behalf of an anonymous client, he thought it would be a simple transaction. However, he did not know that the jewels had been owned by three former business associates of the unknown client, nor of the mysterious tragedy that connects the past to the present. Mannering soon finds out that all is not as it seems, and, as murder follows murder, and the Baron himself is wanted by the police, it is a race against time to solve the dangerous puzzle and clear his name.