Gail and Tom Hartman are struggling to stay together and decide to take a white-water rafting holiday adventure in Montana for their son Roarke's 10th birthday, only to meet up with a pair of mysterious men whose desperation grows, turning their vacation into a nightmare.
After clearing brush for the government, a group of men return to town claiming their friend was abducted their friend. Despite no apparent motive or evidence of foul play, no-one believes their story and his disappearance is treated as murder.
When the experienced guide Vic accompanies the city boy Alan and his three friends on their first wilderness experience, he not only hopes to teach the four boys lessons about the wilderness, but about themselves. Vic pushes them to the limit. Soon after alienating the boys, Vic finds himself in desperate need of help and must rely on his students in order to survive.
