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.

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.