Saban's Power Rangers Ninja Steel starts deep in space, where Galvanax is the reigning champion of the most popular intergalactic game show in the universe, and monsters battle to prove who is the mightiest warrior. Galvanax is determined to become invincible by controlling the mythical Ninja Nexus Prism, which contains six super natural Ninja Power Stars. The only thing standing in his way is a new team of heroic teenage Power Rangers who possess the Prism. The evil Galvanax sends his warrior contestants down to Earth to steal the Prism, with each epic battle against the Rangers broadcast throughout the universe. Together, the Rangers must master their arsenal of Power Stars, Zords and Megazords, each made of legendary ninja steel, in order to stop this evil threat and save our planet from destruction.