"To those of you who lack the courage to die alone. Shall we die together? I'm waiting for those who are interested to contact me." Date: XX Month, 20XX. Somewhere in Tokyo. - Inspired by a post on a certain social media, six people seeking to end their lives gather. At the arrangement of the organizer of the suicide meeting, they will have a final dinner before leaving this world together before dawn. However, it turns out that the six cannot die together; the organizer is discovered as a corpse. Did the organizer commit suicide? Or... was the person murdered? Amid various speculations, the remained five begin to debate.

The year is Genroku, during the reign of Tokugawa Tsunayoshi. In a remote, snowbound village deep in the mountains, a body is discovered. The scene is gruesome—flesh from chest to abdomen has been savagely torn apart, as if by a relentless saw. Someone mutters: "The Saw Demon... It must be the Saw Demon’s doing..." As the cold rain continues to fall, sealing the village from the outside world, hidden motives and quiet fears begin to intertwine.

—For someone like you, solving a case this small should be a piece of cake, right? You wake up in a room you've never seen before. You have no memory of how you got there. Prrrr… Prrrr… Following the sound of the continuous ringing, you move toward its source—and find...

Two good friends live in together in a forrest. They are Geo, member of the warewolf clan and the human Niels. One night during a festival a human is killed. His neck shows bitemarks and the villagers cry that the monsters are to blame. And monsters always live in the woods. In order to prevent the humans from raizing the woods (our home) Geo and Niels decide to find the true culprit.