Scotland Yard unearths the mysterious disappearance of a wealthy, eccentric banker, the reason for a dead man in his bank, and the vanishing of the banks funds. The background shifts from the bank to the club, and the missing millionaires known habits give necessary leads to the unscrambling of the mystery.
He styled himself as the prince of storytellers, and is credited with creating the rogue male genre of adventure thrillers and was one of the earliest writers of spy fiction.