"Surf's Up! Joker's Under!"
Joker kidnaps local surfing legend Skip Parker, and uses a device to steal all his surfing knowledge and ability. He hopes to win the World Surfing Championship and gain the adoration of all the surfers so they will help him take over Gotham City. But Batman learns of his scheme and enters the contest.
It's a good day for dressing up, as Batman puts on his baggies, Dick tries on beach digs, Gordon and O'Hara go undercover as beach bums, and Barbara sports a very revealing swimsuit.
Joker wonders, 'Would a surfboard still be functional if Batman's corpse was inside it?'