When twelve-year-old Ryan reluctantly agrees to join his experienced older brother, Tanner, on a camping trip, he never dreams that it will turn into the most frightening day of his life.

Ryan admits he's no good at sports or outdoor stuff. He'd much rather be playing video games. But Tanner assures him it will be an easy trip. They'll kayak down the Boulder River, fish, and toast marshmallows at night.

When they set out, the river is higher than usual, and the kayaking is scary. Tanner keeps saying there's no reason to worry. But when he's badly hurt in a kayaking accident, Ryan is afraid he's not up to the challenge of saving his brother's life. The only danger Ryan has confronted has been in his video games. What good are those games now, when he's facing a real-life battle?