One day, Umi Yamauchi receives shocking news: his former classmate Yuuki Suzuki has been murdered. While he is still trying to come to terms with what has happened, his girlfriend, Tamao Yagisawa—an ambitious young editor—makes an eerie discovery. She stumbles upon an unpublished novel manuscript titled “Zashisu,” whose plot bears an unsettling resemblance to the murder case.
But that’s just the beginning: Soon, the events from the manuscript begin to manifest themselves in reality. The lines between fiction and reality blur—and a literary story turns into a deadly nightmare.