The great scientist, Dr. Mong develops a new potion which turns a human being into a superhero -Z Ranger. On the other hand, a villain group, Clown Party attacks Dr. Mong s lab to steal that potion. Luckily, before the Clown Party finds, it falls into the hands of two troublemaking boys, John & Leo. By accident, the boys and their dog, Dodo swallowed the potion. At that moment, they transform into Z Rangers and encounter with the villains. All of a sudden, they have to defeat the villains as superheroes but will they be able to take their mission seriously?