Mickey goes to the beach in to dig up clams for a clambake. But his pile of clams goes missing. Following the trail of empty clamshells, he sees a creature in the water that he's never seen before. He thinks it must be a clam-stealing monster. But Odette the Sea Otter explains that she's a fun-loving animal that loves to eat clams. She didn't realize the clams she took belonged to someone else.