When her former boss and mentor is arrested for murder, its up to shapeshifting car mechanic Mercy Thompson to clear his name, whether he wants her to or not. And she'll have to choose between the two werewolves in her life--whether she wants to or not. Original. When her former boss and mentor is arrested for murder and left to rot behind bars by his own kind, it's up to shapeshifting car mechanic Mercy Thompson to clear his name, whether he wants her to or not. And she'll have to choose between the two werewolves in her life-whether she wants to or not.