Enoshima Island, Shonan, where a lot of garbage has washed up through the river and sewage system. This negative energy gives birth to the powerful "Trash Monster: Mad Trasher," who begins to attack mankind! Around the same time, a young man who loves the ocean discovers a mysterious stone during a beach cleanup…
Dr. Sternberg, an evil scientist, plans to disrupt the peace in Hero City. To save the town from danger, Tita Joyce forms the Hero City Kids Force--a valiant group of kiddie superheroes that will fight together against the enemy.