If you liked this movie, you should also see: Battle Royale (2000)Once Upon a Time (2008)Infernal Affairs II (2003)A Dirty Carnival (2006)A Bittersweet Life (2005)
Bun, a schizophrenic, former police inspector comes out of retirement to help a rookie detective solve a complex murder case involving a missing colleague and a suspected policeman suffering from a multiple personality disorder.