Popeye tells Swee' Pea the story of how he once sung baby whales to sleep. The bedtime story is about the ship, Morpheus, its skipper, Captain Brutus, and Popeye, the harpoonist. Popeye refuses to harpoon a big mama who shipwrecks the Morpheus. Swee' Pea wants to know how Popeye got off the island.