After their encounter with the Headless Horseman in the Sleepy Hollow cemetery, Petra Baron and her immortal boyfriend, Emory Ravenswood, find themselves thrust into the bustle of modern-day New York City, where the dangers are both living and dead. A chance encounter with Grigory Rasputin's daughter sends Emory and Petra to St. Petersburg and the eve of the Russian Revolution. Their goal is to destroy the amulet that insures the mystic's immortality, but their actions unintentionally set off a war between Heaven and Hell where only love can survive.