Longarm tracks a killer to the Four Corners… 

When a beautiful Indian woman drops into Deputy Marshal Custis Long’s arms with a bullet hole in her head, he vows to find her murderer. But it’s the dead of winter and Longarm’s cold is bordering on pneumonia—until, that is, he receives a home remedy from Swedish nurse Olga Swenson.
 
Once he’s fit as a fiddle, Longarm boards a train bound for Flagstaff. He’s trailing the shooter to Navajo country in Arizona, but first there is a little federal matter of someone going postal on the Flagstaff postmaster. Taking on twin outlaws, Longarm dispenses some double-barreled justice, never losing sight of his single-minded purpose—catching the coward who took a woman’s life.