Fighting to protect his childhood friend Yuko from the shadowy group that sent the Ace Killer Squad after him, Seiji Hokuto has his work cut out for him. Shinjiro, Jack and the alien Red also join the fight. But the members of the Ace Killer Squad are more ruthless than any enemy Shinjiro has ever faced. Taking down these villains is going to take some help from an older and very upset Ultraman!