Kalimán El Hombre Increíble: El Valle de Los Vampiros #1

Sir Frederic Flagherty, an English aristocrat and friend of Kalimán, decides to sell him the last remnant of his fortune: the Romanov emerald. Before the deal can be completed, he is murdered and the emerald is stolen.

Alice, Sir Frederic’s daughter, and Inspector Douglas of the London police suspect Kalimán of the crime. But the real killer is someone else.

Determined to find his friend’s murderer, Kalimán escapes from police headquarters and meets with Alice, managing to convince her of his innocence. By carefully analyzing certain clues found at the crime scene, Kalimán deduces the identity of the killer and confronts him at a London amusement park.