March, 1917. Industrialist Spenser Cochran has drugged and enslaved a vampire, Don Simon Ysidro, aboard a luxury ship headed to the U.S. Horrified, Dr. Lydia Asher joins the voyage intending to stop Cochran's chemical thrall, but evidence mounts that another vampire is hiding on board. Can Lydia solve both cases and rescue her friend before the ship docks?