They've never faced danger before. Now they're alone--and they have no choice. Every summer, Toughboy and his younger sister stay at their isolated family fish camp on the Yukon River. There, away from their Alaskan village, they help their parents catch and smoke salmon. But that was before their mother died and everything changed. This year, their father brings them back to the camp, but before he can set things up, he vanishes. No one knows that...