Mermaids sing to us about mermaids and fishes at play; they and some other sea creatures dance to it. Buddy as a merman plays tag with a girl mermaid, but he gets too rough and turns her off. Buddy looks inside a shipwreck and drags the girl to it; she busies herself playing with the jewelry in a treasure chest. Meanwhile, Buddy finds some props in another trunk and does an imitation of Charles Chaplin. The girl finds a piano and plays the title song. The noise draws an octopus, who grabs her and swims off, with Buddy in pursuit. The octopus (squid?) drops the girl to fight Buddy, and does so with some success until Buddy lures it into a pipe and ties the tentacles to a flange, then starts bashing the octopus with a battering ram. The girl kisses Buddy; he blushes, then gets hit by the battering ram into her arms.