First Sergeant Ben Carter and his detachment are dispatched to the western part of New Mexico Territory to track down a band of renegade Apache who have bolted the reservation. After days on the renegades' trail, they've come up dry, until they encounter them in the mountains south of Santa Fe. After a brief skirmish, the renegades elude Ben once again. Hot on their tail, Ben and his men are faced with life and death decisions - they discover a grisly scene indicating that the Apache are not the only deadly perils awaiting them in the shadow of the mountain. Nor are they only ones in danger. At Dead Man's Gulch, they come upon a small detachment of the Sixth Cavalry, a white unit stationed in Arizona Territory that has been chasing its own band of renegades, only to find itself trapped and in danger of being annihilated until the Buffalo Soldiers of the Ninth Cavalry come to their rescue. Ride along with the Buffalo Soldiers as they face death, danger and discrimination on the western frontier.