Although Merit did not choose to become a vampire and a Guardian of House Cadogan, she swore to fight for her House and its Master, and she managed to forge strong alliances with the powerful supernatural denizens of Chicago. But even if Merit has had incredible adventures, this could be her deadliest yet... A killer is on the loose in Chicago, attacking people and leaving his victims with magical souvenirs. The emergency services are unable to track down the attacker, and with the number of victims mounting, the city is running out of options. Vampires and humans don't get along very well, but a killer forces them into a strange alliance. But can Merit find the killer before she becomes a target?