It was shocking enough for Father Thomas Kelly to discover a community of vampires. Even more so was that two colleagues, art historian Livia Pietro and scholar Spencer George, were among them. Now they're working together in New York City. When Spencer is attacked in Central Park by a wolf, they're plunged into a world where Native American lore and the doctrines of the Catholic Church have collided, resulting in a catastrophic revelation: the wolf is a shapeshifter and he is searching for a sacred mask with power that, badly wielded, could destroy millions of lives.