Forged notes have started to appear everywhere. Mr. Cheyne Wells of Harley Street has been given one. So has Porter. Peter Clifton is rich, but no one is quite certain how he acquired his money – not even his new wife, the beautiful Jane Leith. Jane, newly married to this man she does not love, is plunged into a nightmare of murder and madness. What is the secret of her husband’s immense fortune? Is he „The Clever One” who has baffled the police, the banks and the world with his clever forgeries? Or is he a homicidal maniac? Inspector Rouper and Superintendent Bourke are both involved in trying to solve the mystery.