Tom and Gale are estranged from each other. In order to bridge the gap, they decide to take their son Rock on a whitewater adventure. On the way they met three suspicious people, Wade, Terry and Frank. Frank, who was the guide, disappeared suddenly. Wade used some small means to "crow in" Rock so that Rock would worship him as a hero, but Tom and Gail remained vigilant.
In fact, Wade and Terry are criminals who robbed huge sums of money and escaped. They finally showed their hideous features and held a family of three hostages, preparing to flee the country downstream. Tom escaped from the tiger's mouth and lay in wait downstream. Wade thought that Tom was dead, and walked down safely. He didn't expect Tom to hit them by surprise. Gale on the boat cooperated with her husband to kill Wade. After the disaster, the family united again.
