When Grace, an ordinary waitress with a terrible choice in men rescues a kitten, little does she know her life as she knew it is over. When Gabriel, a former crusader masquerading as the kitten saves Grace from one assassination attempt, he suspects another might not be far behind. With an invisible assassin, meddling Watchers, absentee Boss and his humanity returning, Gabriel is facing a dilemma – to follow his heart or volunteer for a promotion at the severely understaffed Agency of Guardian Angels.