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!