Back in the early 18th century, in the heyday of piracy, the gold-laden sea-robber brig "Hussar" sank in the East River. Nowadays, documents appear that allow you to establish the place where the ship rests. For unknown reasons, people interested in the fate of the ship die one by one. Detective Conrad Voort, the investigator who received the name Hell's Gate, learns that very high-ranking people are involved here who are trying to put pressure on the investigation. Soon, Voort himself and his bride are in danger. Will the detective be able to get to the bottom of the true reasons for what is happening?