A secret message from "Lyla", an institution queen who dedicated suicide 5 years earlier. It was sent to a previous senior high school schoolmate, her elderly, as well as her sis. Every person was asking yourself exactly how this message was sent out. Since Lyla had died a long time ago ... So the 12 of them went back to a deserted island. This is the location where Lyla passed away five years ago ... to pay tribute to Lyla and also discover who actually sent out the message to prank ... However the closer it gets to the truth, the more they uncover their harsh past. The dark keys of individuals they call "good friends" till this deserted island ... has actually ended up being a bloody sector ...