After ten years in jail, James Storer is offered parole conditional upon him leading a group of delinquent teenagers on an outward bound trip through dense and dangerous terrain on a notorious white water river. James finds himself in deep in a remote wilderness with six streetwise teenage felons who have been bullied and blackmailed into joining the trip by Liz, a hard boiled parole office. Despite the best efforts of James and Liz to control the group, one of them steals the satellite phone and takes off in the middle of the night. Now their only lifeline to the outside world has been cut off. Soon they are aware of a menacing presence around the camp. To get to safety the remaining group must battle the white water rapids whilst surviving a constant threat from mysterious intruders.