Mercedes Thompson, aka Mercy, is a talented Volkswagen mechanic living in the Tri-Cities area of Washington. She also happens to be a walker, a magical being with the power to shift into a coyote at will. Mercy's next-door neighbor is a werewolf. Her former boss is a gremlin. And she's fixing a bus for a vampire. This is the world of Mercy Thompson, one that looks a lot like ours but is populated by those things that go bump in the night. And Mercy's connection to those things is about to get her into some serious hot water...