The drama tells the story of a group of seven university students who travel to a deserted island where a strange decagonal mansion stands. It was the scene of a grisly mass murder six months earlier, and events soon turn ominous.

Etsuko Kono is a 28-year-old woman who loves fashion. Aspiring to become a fashion editor, she joins a publishing company, but is sent to work in copy editing. There, her job is to correct errors and inadequate parts of documents and copies.

Komatsu Kie (Key), a magazine writer from Tokyo, teams up with Omine Sakura, an Okinawa native, to pursue the truth of a sexual assault case.

In 1989, a rookie editor visits a mysterious mansion for a séance, only for a psychic to vanish and a string of murders to begin. As a young mystery writer joins the investigation, dark secrets hidden in a cryptic poem left by the mansion’s owner start to unravel.

Ishikawa Ango is a very capable detective that lives only for his job. One day, while investigating a crime scene, he gets shot in the head by the criminal that was still lurking about. Ango gets thrown over that line that divides life and death but, though he dies, doctor's are able to reanimate him and he pulls through. Yet, the bullet remains stuck in his head as the operation to remove it is very dangerous. Shortly after, he goes back to work and soon realizes that he's now able to see and talk with the recently departed.