There’s a new family on the river… the beavers. And they’re ruining everything for the Otters. The beavers’ big fat dam has blocked up the river and worse… it’s stopped their supply of delicious crayfish! Something must be done! It seems like things can’t get any worse for our otters until they discover a mountain lion has also moved in. Can the riverside families overcome their differences to scare off this hungry-looking foe?