When Batman (Adam West) and Robin (Burt Ward) get a tip that Commodore Schmidlapp (Reginald Denny) is in danger aboard his yacht; they launch a rescue mission. But the tip is a set-up by four of the most powerful villains ever; who seek to defeat the Dynamic Duo once and for all! Armed with a dehydrator that can turn humans into dust; the fearsome foursome intends to take over the world! Can the Caped Crusaders use their high-flying heroism and groovy gadgetry to declaw Catwoman (Lee Meriwether); ice the Penguin (Burgess Meredith); upstage the Joker (Cesar Romero); and stump the Riddler (Frank Gorshin) in time?