At the beginning of the 20th century, London is in the grip of a daring gang led by George Wallis. Every night, safes are broken in the offices of the most famous bankers, brokers, and jewelers. The burglars leave no evidence behind. The police are powerless despite round-the-clock surveillance and intensive interrogations. But then Wallis’s affairs are interfered with by a mysterious stranger—who is he? An accomplice, a rival, or a deadly enemy? The truth will not please many people.