Galvanax is the reigning champion of the most popular intergalactic game show in the universe, and contestants battle to prove who is the mightiest warrior. Galvanax is determined to become invincible by controlling the mythical Spirit Crystal, which contains six supernatural Ninja Power Throwing Stars. The only thing standing in his way is a new team of heroic teenage Power Rangers who possess the Spirit Crystal. The evil Galvanax sends his warrior contestants down to Earth to steal the Crystal, where each epic battle against the Rangers is broadcast throughout the universe. Together, the Rangers must master their arsenal of Throwing Stars, Robots, each made of legendary Ninja Steel in order to stop this evil threat and save our planet from destruction.