In the town of Duckburg on a summer day, the evil King Lod throws peaceful ducks in his rotten jail, falsely accusing them of trying to steal his gold. Scrooge McDuck and his nephews Huey, Dewey, and Louie take their homemade submarine to Atlantis to find the secret gold, but King Lod has another plan for them. Scrooge is able to solve the problem and help them escape by shooting a rock that explodes in King Lod's face.