Kathy Austin and her Brazilian Navy partner have finally stumbled upon the lost German submarine but quickly discover that they aren't the first to set foot in it since it was abandoned. When Reinhart and the doctor, the two Nazis looking for the gold hidden in the U-boot, arrive in turn, bringing with them Jo, the albino with otherworldly powers, secrets will be revealed, old debts will be settled, and the British spy will finally be able to close her investigation - for now.