Part of MKC's Revenge Week (July 8-14, 2013).
By Paul Quinn, founder of the excellent Hangul Celluloid.
Shortly after being teamed up to work together, veteran Seoul police detective Ja-young (Shin Eun-kyung) and rookie cop Dong-wook (Eric Moon) are assigned to investigate the death of a high school student who is thought to have committed suicide. An autopsy is performed, revealing a small, pill-like capsule inside the boy's body which contains a scrap of paper from a diary, with the details of a previous murder (of another high school student) written on it. When a similar capsule is also found in that victim's body, Ja-young and Dong-wook realise that both boys were, in fact, murdered by a serial killer and, convinced that the writer of the diary is the perpetrator, they set out to track him down. The only problem is, he too is dead...
