Bleak Night(파수꾼)is a March 3, 2011 Movie directed by Yoon Sung-Hyun South Korea.
When a student dies, his father starts investigating how and why it happened. One of the three friends is the perpetrator, another is the victim, while the third is enraged at how their friendship was shattered. Then it is discovered that the dead student was actually the perpetrator and not the victim. How could this be? -- Pusan International Film Festival