Sky was human once. Now he's part demon, and he can't stop himself from catching fire every time he feels strongly about something. Any emotion will do—fear, shock, arousal. Being freed from the lab he'd spent almost a year in would be a good thing if he could control his new ability, but as it is, he risks setting the warehouse and the council assassins on fire, including his mate. Ulric can't say he's happy about his mate's ability to control fire, but that's mostly because Sky can't control it right now. Even though Sky pushes Ulric away, he has help and people who can teach him what to do. The problem is that when it comes to Ulric, Sky doesn't seem to be able to keep his emotions in check, and that might mean they can never be together. Ulric is ready to do everything he can to help Sky, even if it means getting burned here and there. Sky doesn't share that opinion, though, and he knows he has to learn control—or let Ulric go.