Duggee and the Squirrels are enjoying a day at the beach. Suddenly a great shadow comes over them as they are dwarfed by a giant, regal sailing ship that has run aground on the beach. The Squirrels go to investigate. They encounter the Penguins who explain they were on a very important mission when they got sick. They need to head to a nearby island, but they are too poorly to sail the ship. Can Duggee and the Squirrels help?