belatedly one nighttime at a high school chapel, four student make a treaty to kill themselves that nighttime. The girl subscribe the treaty with their own blood and pledge that if anybody survive they will be haunt for the remainder of their life. so merely one of the four student, Eon-ju, really commits suicide by jump to her decease. The following day rumor fly around their school on the reason why Eon-ju kill herself. The stay three girl maintain to themselves as they are haunt by their pledge and shortly plenty the school become cover in blood …