On a brutal stretch of the Mojave Desert, Robert Ryan as Donald Carson III breaks his leg during a trek and becomes stranded under a merciless sun. His wife Rhonda Fleming as Geraldine Carson and her lover, William Lundigan as Joe Duncan, tell him they will fetch medical aid, but they do not return. They fly back to Carson’s mansion in Los Angeles, waiting for him to either succumb to the desert heat or take his own life so they can keep his money and move forward with their plans. Carson, however, vows to survive and to exact revenge on the treachery that trials him in such a stark landscape.
With quiet, stubborn resolve, he fashions a splint for his broken leg and begins to move, inching along the rocky ground while the sun blazes overhead. He digs a crude well to obtain water, and he shoots a deer to stock up on meat that will sustain him for days. The desert tests his endurance, but he refuses to quit. As days turn into a grueling test of will, law-enforcement authorities pause their search after several fruitless attempts, believing the case is unsolvable and may never be resolved. The absence of hope only sharpens Carson’s determination to outlive those who betrayed him.
Meanwhile, Joe Duncan grows nervous. To confirm the worst, he flies a small plane over the area and spots the faint glow of a campfire in the distance, suggesting that Carson might still be alive. Gerry and Joe decide to return to the desert to finish the job if necessary, a plan that hinges on one more decisive move. Joe discovers Carson still limping along, and is poised to shoot when an old prospector named Sam Elby—Henry Hull—arrives in a jalopy and offers Carson a ride back to a nearby shack.
Back at Elby’s place, Carson admits that revenge once drove him, but the will to stay alive has begun to overshadow even that treacherous impulse. As Elby steps outside to draw water from the well, Joe, who had been watching from the shadows, ambushes the scene. A desperate struggle erupts inside the shack, and a toppled stove ignites a fire that sweeps through the small structure. Both men are battered and nearly unconscious, but Elby reappears just in time to drag Carson to safety while Joe dies in the blaze.
The morning after, Elby drives Carson toward the nearest town, and they spot Gerry walking alone along a long, remote stretch of desert road. Carson speaks with a quiet, firm voice, offering her a stark choice: wait for the authorities to find her, or ride into town with them. Gerry hesitates, then climbs onto the back of the car, choosing a future that will unfold under the watchful glare of the desert sky.
