On the afternoon terrace of the school, a girl named Kana suddenly committed suicide. A classmate, Akiko (played by Yuko Oshima), heard the chilling song Kana hummed during her suicide. The incident stirred a media frenzy, and editor Riku Nagase (played by Ryuhei Matsuda) from a third-rate magazine called 'Monthly MASACA', along with his colleague Taichi (played by Yusuke Iseya), investigated to find the root of the event - all those who had sung a popular song called 'My Flower' released ten years ago had committed suicide. Riku received a lead on Kana's boyfriend from her classmates, but upon arrival, he found that he had also committed wrist-cutting suicide. Later, to experiment with the 'contagious song', Taichi took a group of high school girls to sing 'My Flower', resulting in Taichi committing suicide that night, followed by a series of other high school students the next day. Feeling the situation was critical, Riku sought help from the abbot (played by Hiroshi Abe), who possessed supernatural abilities, along with the remaining individuals who sang the contagious song.