Can an angel fall in love with a demon? 
 Lore is another of the Eidolon's brothers i.e. a Seminus half-breed demon and his job is to assassinate people without really caring who will be dead. He is not your usual seductive Seminus demon. Having a cursed right arm, he cannot really have sex with females and he needs to take care of himself in order not to die. 
 His last job is to kill Kynan the marked sentinel, ex Aegis agent and a person Lore actually likes. Unfortunately if Kynan does not die, Sin will die. Sin is his sister and the only known female Seminus demon (Sin Undone is her book and it is the book that will give a head start to the Lords of Deliverance series). 
 Idess is an angel and her job is to protect at any cost and with every method i.e. she is a guardian angel. She is not your usual gentle angel, she is a Memitim and she needs to earn her wings. The surprise of the book is actually who her father is. 
 Her last job is to protect Kynan. Tough job because Lore is really determined. The only solution is to seduce Lore and to persuade him not to kill the marked sentinel. 
 The scenes between Lore and Idess are smoking hot explosive. I think I developed a thing about men in chains after reading this book.