It was mid-February and bitterly cold in Stockbridge Marsh. The beaver family went about their daily chores, unaware that their peaceful world was about to change completely.

The safety of their home is suddenly threatened when a mysterious group, believed to have died out generations ago, reappears. Even more shocking, this very group has kidnapped the only child of the beavers' closest friends.

Now, it is up to young twins Billy and Bobby to go on a rescue mission. They are still very young, with no experience and no idea where the child has been taken. They do not even know which direction to go.

In short, they really had no idea what they were getting themselves into.