Yuki (Aki Umezawa), the woman they saved from the horror Hertzbai a few days ago, has asked Ryuga and Rian to help her find her missing sister Lisa (Emi Kobayashi). Lisa may have been attacked by a horror in the circumstances. Ryuka heeds Yuki's wish and follows Lisa's rumours to the bar's owner, Kaji (Hitoshi Katagiri). Meanwhile, Lisa is locked up in a mysterious room.