Sayaka was excited at the prospect of striking out on her own; so excited that she invited her closest friends to her new apartment to celebrate. In the middle of the party, however, Sayaka begins acting very strangely and lunges over the balcony to her death. But Sayaka was never suicidal, and her friends refuse to believe that she could have taken her own life. When Sayakas sister Mariko decides to investigate, she discovers that her sibling wasnt the first to take a fatal plunge from that particular apartment. Though Mariko is by no means superstitious, shes about to come into contact with a force more evil and powerful than she could ever imagine.