In the rugged terrain of the Wind River Mountains, what begins as a routine ultramarathon training session for Gabe Joyes quickly escalates into a life-threatening ordeal. After a misstep leads him to inadvertently pierce himself with his trekking pole, Joyes finds himself isolated in a remote canyon. Now, he faces his most formidable test of endurance yet, as his wife Jenny and SAR volunteer David Englert try to reach him in time.