The Super Mario Bros. The movie revolves around the adventures in the Mushroom Kingdom world of plumber brothers Mario and Luigi. After accidentally entering a strange land from a water pipe, Luigi is separated from Mario and falls into the hands of the evil turtle monster Bowser, who is plotting to monopolize the world. While trying to find his brother, Mario encountered Toad and Princess Peach. From here they work side by side on the journey to stop the dark forces.