Oliver the octopus embarks on a quest for a rumored sunken treasure. Along the way, he joins a game of hide and seek with a school of fish, and later, he encounters Harry the hermit crab at the shipwreck. Harry challenges Oliver to a dance-off for the treasure chest. Oliver wins, only to find the chest filled with colorful seashells instead of gold or jewels. The true treasure turns out to be the laughter, friendship, and memories he made during his adventure.