Two beavers thwart an evil plot by penguins who plan to turn Beaver Island into a frosty resort.

Ace and Bub stand up to nearsighted Captain Jo Jo and his crew of moles, who are stealing dirt from Beaver Island to make their own island home bigger.

In their fourth adventure, the Flying Beaver Brothers set off in their sailboat to enjoy some well-deserved rest and relaxation at nearby the island. But the birds and bunnies who live on Little Beaver Island have other ideas. Before long, Ace and Bub find themselves embroiled in an all-out war between the feathers and the fuzz. Can the Flying Beaver Brothers bring peace to Little Beaver Island?

When Ace and Bub compete in a race to win a new houseboat, they unwittingly plant fast-spreading vines instead of trees on the Shark Tooth Islands, forcing their inhabitants to live in the sea.