Luce is forced to leave everything behind and go to a reformed school after they blame her for a horrifying murder of a young man. She didn't kill the boy, but nobody's interested in what she has to say. At the school, she meets Dan, a dashing fella that she falls for almost immediately. He's hiding a huge secret, but that makes him even more attractive for Luce. Soon, she realizes that he's not a human being but an angel who's been in love with her for eternity. The news shock and confuse her, and there's another angel at Sword & Cross who wants to be with her. It's up to the 17-year-old teenage girl to pick between the good and the bad, Heaven and Hell.