A year had passed since former Marines Jane Carter and Tanner Riley completed their journey on the Appalachian Trail. Now, they were navigating through the rugged landscape of Montana's Bob Marshall Wilderness Complex. Meanwhile, a tactical team of FBI agents in Missoula, Montana, is on a desperate search for two deranged serial killers responsible for a string of gruesome murders that has the entire city on high alert. Unbeknownst to the two adventure seekers, they are on a collision course with the killers, potentially getting caught up in their twisted game.