Superman and Aquaman find themselves entangled in a deep-sea mystery when they meet the tenticled attack of a giant squid. The Wonder Twins, and their space monkey Gleek, teach some young people the serious dangers of playing the foolish game of "Chicken". It's the SuperFriends' problem when trouble surfaces on the high seas. All are in trouble from the menace of the deep, the marauding Manta and his terrifying water beast. Superman and special guest hero, Samurai, face the heat of a volcano in making a dangerous rescue.