
With the Yellowstone Ranch behind him, Dutton joins an elite unit of U.S. Marshals, combining his skills as a cowboy and Navy SEAL to bring range justice to Montana. Kayce and his teammates -- Pete Calvin, Belle Skinner, Andrea Cruz, and Miles Kittle -- must balance the high psychological cost of serving as the last line of defense in the region's war on violence with their duty to their families.

After a close call with a suicide bomber, the Marshals hunt for a co-conspirator armed with an even larger explosive; a suspect's family is distrustful of the government, and it makes getting answers nearly impossible.