At the crime scene, journalist Takako Nozoe learns from Detective Yusaku Motomiya about traces of coal found in Mr. Wang's body as well as the fact that Yumi Nakamura is still declared missing ever since she killed Hiroshi Yamashita a year before.

She personally questions Naoto the next day and tells him about the cursed call, the victims it claimed over the previous year, and its origin: Mimiko Mizunuma.

To help solve the case, Motomiya orders autopsies on all cursed call victims, including Mimiko, all of whom show positive results of having traces of coal dust.

Takako contacts her estranged husband, Yuting Chen, who lives in Taipei, and from him learns that similar deaths related to cursed calls also happen all over Taiwan.

Takako becomes increasingly suspicious upon hearing that Motomiya perished in a car crash the day before while en route to confirm Yumi's corpse.

Kou Shibasaki, Shinichi Tsutsumi, Kazue Fukiishi, Anna Nagata, Atsushi Ida, and Kana Ito additionally appear as Yumi Nakamura, Hiroshi Yamashita, Natsumi Konishi, Yoko Okazaki, Kenji Kawai, and Rina Tsuchiya, respectively, through archive footage from the first film.