Superman and Aquaman discover a deep down mystery of sinister submarines and sea life as they battle the Invisible Menace. Those Wonder Twins and Gleek excel with Exxorian powers when they have to bring a dangerous initiation stunt to a safe ending. The SuperFriends zoom off in an all out struggle against invading insects from a far off planet, for the entire Earth is threatened by the coming of the Arthropods. Flying over jungle rain forests, Wonder Woman and Rima search for some missing scientists who are about to become victims of the River of Doom.