When a man is murdered under mysterious circumstances, and the only thing left at the crime scene is an ownerless key, a series of astonishing events unfold, drawing the reader into a world of secrets, deception, and dangerous pursuits. This novel is one of the finest creations by Edgar Wallace, a writer who has made his mark as a pillar of international detective literature thanks to his intricate plots and captivating characters. In this novel, Detective Mark Briscoe follows the threads of a mysterious crime, where interests intertwine and passions collide, while the killer stalks his shadow in a city brimming with mysteries. Wallace is a master of suspense, where secrets slowly unfold, intelligence blends with deception, in a race against time to decipher the mysterious key. With his tireless style, Wallace weaves a story that captivates the reader from the first line, presenting a tight plot that cleverly escalates until the final moment. His characters are vibrant, and his events are so exciting that every page is an adventure on its own. If you're a fan of detective fiction, get ready for a journey with an unexpected ending, where the truth isn't always what it seems, and the secret is always in the little details.