Michael Dixon is an agent working linewatch for the United States Border Patrol on the U.S. Mexico Border in New Mexico. He is well-respected by his peers at US Border Patrol and loved by his wife Angela and 5-year-old daughter Emily. Michael and his partner Luis DeSanto discover a van full of dead illegal immigrants, and they go in search of the "coyote" who was leading them across before he left them for dead. At the same time, Michael has to deal with a Minute Men-style militia led by Ron Spencer. The search for the coyote leads Michael and Luis to a trailer, and results in a shootout where Luis gets shot.