The name of Edgar Wallace runs through the crime fiction of the early twentieth century like a stream that turns out to be much deeper and wider than at first glance we might have imagined. For many, Haynes, known as Gunner (The Gunslinger), is not a criminal, but a gentleman of the unorthodox methods. For Scotland Yard, he is one of the most experienced thieves in the world. Gunner and Luke Maddison belong to completely different worlds, because Luke is a respectable banker with a charming fiancée... But Luke did a favor for Gunner that he will never forget, so when the banker gets into trouble, Gunner decides to intervene to get his acquaintance out of his nightmare...