Sloan is a banished Angel from Heaven stuck on Earth, even worse he is not allowed to leave the confides of Carrigan Castle which has been his home for the last five hundred years. When he learns about Lucifer's plans to escape from Hell and start the Apocalypse he calls his old friends home to help him save the world and the woman he has fallen in love with. Eleanor is a lawyer from New York, and on her twenty-eighth birthday she loses her job, her boyfriend and her grandmother. Returning to Scotland she discovers a terrifying truth about her family and their charge to take care of an ancient castle along with it's angelic inhabitant. Eleanor soon finds herself in a plot to save the World while quickly falling for the Angel.