Detective Gotou enlisted the help of Yakumo to investigate a supposedly ghost video taken at Nanase Mansion, where 4 members of the Nanase family was murdered 15 years ago. The video was obtained by Hijikata Makoto and filmed by a scriptwriter Hoshin Yukiko. Yakumo went off and investigate on his own after watching the video. While interviewing Hoshin, Gotou noticed that she resembles the woman seen with Yakumo's father but was unsure of his observation...