In the streets of London, a state of terror spreads after a deadly snake appears on the loose, prompting the Three Men of Justice to intervene in a new mysterious investigation. George Manfred and his friends Gonzalez and Boeckart follow the leads of this horrific case, only to discover that the snake is only part of a gang plot led by a mysterious Swedish man named Oberzon. But the biggest surprise comes when the gang tries to kidnap a simple country girl named Mirabelle, which raises questions about why she was targeted. As the threads intertwine and the danger increases, the three men of justice must confront a mysterious enemy and uncover the secrets of this deadly gang. Will they be able to rescue Mirabelle and take down the gang? A novel full of suspense and excitement that deals with another of the adventures of the "Three Men of Justice."