Beavers Bub and Ace battle the Fish Stix corporation in an attempt to save their island's trees.

A twelve-year-old girl and her two best friends determine to rescue two orphaned beaver kits, and soon find themselves trying to solve a local environmental crisis.

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.

Ace and Bub's plans for a quiet vacation are put on hold when they are stranded on an island where their nemesis, Walter, has stirred up trouble between the birds and the rabbits.

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.