The Blood Pledge (2010)

Unjoo, Soy, Eugene and Eun-young, are four good friends who swear their friendship with blood late one night at chapel within their school compound. They promise each other that their bonds will last through death, so much that they are even willing to die together.

Strange rumors start to spread at the girls’ school and Unjoo’s younger sister Jung-un who attends the same school gets suspicious about her sister’s death. . She tries to find out the truth by questioning Unjoo’s friends – Soy, Eugene, and Eun-young but all of them mysteriously keep mum. What are they hiding? Why would Unjoo kill herself? Was it really suicide?

The remaining girls are chased by death as their promises weigh heavily over them. Will the desire, jealousy and lies that are hidden behind this pledge of death between the four girls unravel, along with the real truth behind Unjoo’s passing?