The Little Mouse and the Big Hungry Bear are known and loved by millions of children around the world. Little Mouse loves strawberries, but so does the bear... How will Little Mouse stop the bear from eating his freshly picked, red, ripe strawberry.

While their parents are away doing research, brothers Duffy and Sumo Pugg go with their cousin, Mister Come-and-Go, to Kokalaha Island, where they meet Aunt Lulu and become trapped in an erupting volcano.