After causing a major incident, police officer Daigo Agawa takes his wife and daughter to live in the remote mountain village of Kuge. It seems the perfect place to recover from the ordeal, despite the mysterious disappearance of a previous officer posted there. One day, the body of an old woman is found on the mountain. The Goto family says she was attacked by a bear, but Daigo notices a human bite mark. It soon becomes clear that not all is as it seems in the village.

Akira is the legendary killer known as the Fable. Following the order of his boss and due to being overworked, he lives peacefully with his partner, Yoko, as ordinary siblings. Akira still works part-time at design company Octopus with CEO Takoda and employee Misaki. CEO Takoda and Misaki are unaware of Akira's background as an assassin. Meanwhile, Utsubo is a representative for an NPO. But, Utsubo works with contract killer Suzuki to set people up for extortion purposes. They target someone at design company Octopus.

One day a mysterious box arrived and a curse began to spread all over. The source of the box is 'Jukai Village'. The village is hidden in Jukai Forest, a suicide spot that once you enter it, you can never come out.

A restaurant owner moonlights as a courier who fulfils delivery requests from various clients, who each have various circumstances that lead to the necessity of requesting his services.