The Mad Detective aka Sun Taam

Inspector Chan Bun (Ching Wan Lau) was a great detective.  Unfortunately, he loses his job when he cuts off his ear and gives it to his boss as a retirement present.  Inspector Ho (Andy On) is investigating a case on Inspector Wong (Kwok-Lun Lee) who disappeared while chasing a thief into the woods.  Several weeks after his disappearance an outbreak of armed robberies and murders are committed with Inspector Wong's gun.  When inspector Ho can not come up with any leads he asks Bun to help him solve this case.  After witnessing Bun's unique style of investigating, inspector Ho realizes that his mentor is truly mad.