Anna Pigeon has been a ranger with the National Park Service for many years, but she had a very different life before tragedy sent her west seeking something new. Now Nevada Barr finally tells the previously untold story of Anna’s first foray into the wild, and the case that helped shape her into the ranger she became.

Thirty-five years old, fresh off the bus from New York City, and nursing a shattered heart, Anna Pigeon takes a decidedly unglamorous job as a seasonal employee of the Glen Canyon National Recreational Area. On her day off, she goes hiking into the park never to return. Her co-workers think she’s simply moved on - her cabin is cleaned out and her things gone. Anna herself wakes up, trapped at the bottom of a dry natural well, naked, without supplies and no clear memory of how she got into this situation.

As she slowly pieces together her memory, it soon becomes clear that someone has trapped her there, in an inescapable prison, and that no one knows that she is even missing. Plunged into a landscape and a plot she is unfit and untrained to handle, Anna Pigeon must muster the courage, strength, and will to live that she didn’t even know she still possessed in order to survive, outwit, and triumph.