While flying across the Atlantic on the centennial anniversary of the Titanic's tragic maiden voyage, Apolline Greer, last in a long line of vampire hunters, finds herself suddenly transported from her airliner cabin to an eerily familiar ocean liner cabin-as well as the entirely unfamiliar body of her ancestor, Noelle Greer. Upon learning that she is, in fact, on board the very ship she's been fascinated with all her life, she knows there's only one thing to do: get off as soon as possible.

But whether by destiny, freak coincidence or a really vivid dream, Apolline finds that her trip back in time comes with three very good reasons to stay on board: Alexander Walker, a handsome and charming fellow vampire hutner; Cristof, the vampire that has tormented her family for generations and very likely killed her own mother; and Sasha, the vampire Noelle was sent to kill.

Time, however, is not on Apolline's side. The Titanic is on a collision course with destiny, and she only has four days to complete her quest. What seemed like more than enough time at the start quickly becomes too short as she finds that hunting vampires on a luxury ocean liner is much more difficult than she expected. Sasha and Cristof become more elusive as each day passes, while her feelings for Alexander become increasingly complicated. As that fateful night approaches, will she regret her decision to stay and witness history first-hand?