A Lucas Davenport thriller from #1 New York Times bestselling author and Pulitzer Prize winner, John Sandford. It's terrifying.

They call them Travelers. They move from city to city, panhandling, committing no crimes—they just like to stay on the move. And now somebody is killing them.

Lucas Davenport’s adopted daughter, Letty, is home from college when she gets a call from a woman Traveler she befriended in San Francisco. The woman thinks somebody’s killing her friends and she’s afraid she might know who it is. Now her male companion has gone missing. She’s hiding out in North Dakota, and doesn’t know what to do.

Letty tells Lucas she’s going to get the woman and, although he suspects Letty’s getting played, he volunteers to go with her. When he hears the woman’s story though, he begins to think there’s something in it. Little does he know that, in the days to come, he will embark upon an odyssey through a subculture unlike any he has ever seen, a trip that will not only put the he and Letty in danger—but just may change the course of his life.