Like most people who own their own business, I work long hours that start early in the morning. So when someone calls me in the middle of the night, they'd better be dying....

Mechanic Mercy Thompson is woken at 3:00 a.m. by a vampire calling in a favour. He has to deliver a message to a fellow undead and needs a witness who won't be noticed - and Mercy's shapeshifting abilities make her the perfect candidate.

But the assignment turns into a bloodbath, and Mercy attracts the attention of not just a powerful vampire but the even more powerful demon possessing him. She can count on the supernatural community for protection - and alpha werewolf Adam would like her to rely on him in other ways too - but when it comes to being proactive, she's on her own.