After her father mysteriously disappeared, the beautiful Miss Morstan receives a gift every year: a strange pearl. Who is sending her these pearls? And why does the unknown benefactor suddenly want to meet her? For Sherlock Holmes and Dr. Watson, a thrilling game of cat and mouse begins. In the hunt for an Indian treasure, they discover the eerie Sign of the Four. The dark figure beside him stirs and rises. A small man with a large head and disheveled hair. He grins, pulls back his lips, and bares his teeth like a wild dog. Holmes immediately aims his revolver at him. "Watson," he hisses, "draw your revolver. And shoot if he raises his hand." At that moment, Holmes and Watson fire simultaneously. The dwarf spins around and finally falls headfirst into the river.