While camping with her family on a remote island, five-year-old Anna awakes in the night to the sound of her mother screaming. A rogue black bear, 300 pounds of fury, is attacking the family's campsite, pouncing on her parents as prey. Anna manages to get her brother into the family's canoe and paddle away. But when the canoe dumps the two children on the edge of the woods, they must battle hunger, the elements, and a dangerous wilderness.