Theatrical version of episode 5 of Ultraman Ace TV series. Two women go missing, with witnesses testifying that they vanished underground. The only common link between the incidents was that both women had type O blood. TAC closes the case, but when Yuko and Seiji are out shopping, Yuko herself is targeted. Seiji manages to free her, and the two catch a glimpse of the terrible-monster, Aribunta.