The team's investigation of a sunken wreck, the Black Mantis, brings them afoul of an insurance inspector who believes they are smuggling stolen artifacts. Seeking to clear their names, the investigation takes them after a ring owned by a Baron Wainright and his nephew, Daniel. The Baron has a horde of curiously-undamaged treasures from the ship, purportedly stolen by John Roach, aka Captain John Blood. The nephew tries to help them and Daniel reveals that "Baron Wainwright" is actually Roach and they are both a vampires. The Captain traps the gang and tries to kill them but Judson uses a cannon to blow open the wall to the sunlight and both the Captain and Daniel disappear. Judson dismisses the idea of vampire but a portrait of the original Daniel Wainwright matches the man they met.