In the London Underground the Alliance of Silver and Steam is all that protects humans from demons. Felicia Gannon is no stranger to the demons that lurk in the night. After her parents were murdered in front of her the Alliance took her in and trained her. Vengeance became her only drive. Greyston Westham is more than just the devilishly handsome Captain of the Guard. He's an Incubus Demon who hunts his own kind because they have no use for lesser...