I love most Chinese HK film having brought up with them. This one in particular I would highly recommend. It's typicall HK style - fast motion, lots of emotional highs and lows, self-pity, utter madness and senseless beating up scenes.
The story line is very simple. A detective (now retired) has a mental illness problem coincide with a talent to "see" things hence solve mysteries. He was seek by a rookie to help solve a case involving the disappearance of a fellow police officer. The journey and mayhem both questioning the moral judgement of each individual throughout the entire film is portrayed.It is slightly different from the average and Bun's character played by Lau Chin-Wan is very convincing.
Good entertainment, not-overtly funny but funny enough with fast action flick typically delivered by HK directors. Enjoyable.. although I couldn't bear to see the Van Gogh scene ie when he cuts his ear. Euww..