2003 film by Johnnie To

A martial arts instructor working at a police academy gets imprisoned after killing a man by accident. But when a vicious killer starts targeting martial arts masters, the instructor offers to help the police in return for his freedom.

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.

The story revolves around a Spring, a hitman from mainland China who is on a mission in Hong Kong with his partner Setting Sun. However, Spring falls ill and comes under the care of a screenwriter by the name of Soya and they find themselves developing into a tight and everlasting friendship.

The fantastic story of how an ancient martial art, Chinese kung fu, conquered the world through the hundreds of films that were produced in Hong Kong over the decades, transformed Western action cinema and inspired the birth of cultural movements such as blaxploitation, hip hop music, parkour and Wakaliwood cinema.

Five young hoodlums sing karaoke, murder, joke around, get beaten up, win and lose women, and learn the value of blind loyalty.

Angel of Nine Heavens is found to have fallen in love, and is banished to Earth. Windfall God is secretly in love with her, and begs the Jade Emperor to be given a chance with her. He is sent to Earth in human form, only able to use his godly powers three times per day. He has seven days to find the reincarnation of Angel of Nine Heavens and make her fall in love with him.

Although Chicken does not make an appearance, Chan Ho Nam finds a new love interest in the form of Mei Ling. Meanwhile, Tung Sing returns to cause trouble again for Hung Hing, in the form of new leader Szeto Ho Nam.