80年前,男的教畫畫、女的教彈琴,在同一高中內二人靜靜地戀上。情事不能公開,男的只可在隔壁偷聽她的琴聲。一天鋼琴搬走了,男教師突然失蹤,女的便傷心而終。多年後,戲劇組女學生自殺身亡,沒留下遺書,餘下的竟是80年前女教師愛彈的那篇樂章!她的戲劇遺作中,又竟與十誡中的引言有關?怪事接踵而來,命案也離奇地相繼發生。更離奇的是每宗命案,都似乎與新來的男生有關…改編自日本暢銷過十億的「死者之學園祭」。
80 years in the past, an unfulfilled love between two teachers in Tezuka Academy tragically leads to mysterious death. Many years later, Yuko, a Drama club student, kills herself by jumping off the school rooftop, leaving no suicide note but a pieve of music that the dead music teacher who used to play. Yuki, the best friend of Yuko, decides to stage a play Yuko failed to finsish. but when Yuki begins to suspect that a quotation from the Old Testament in Yuko's script is in fact a last message, tragedy strikes around her.
Some students decide to set up a play written by one of their classmates, who has commited suicide. The play is based on a tragic and mysterious legend about a love affair between two teachers at the school long ago. Some girls then accidentally stumble over some information about the legend, and the girl who commited suicide. Shortly after, the girls start turning up dead in seeming accidents.