Follow the river

"When Billy and his dad are injured, Tom summons the courage to get back on the water. This time, he must travel in a rickety old homemade canoe through the Alaska wilderness to get help. But it's not just the canoe and the terrain he has to worry about-he's surrounded by dangerous adversaries. Are his skills enough to fight them off or will his journey be cut short and Billy and his father left stranded?"--.