Pro Taipei City the Public Security Bureau of Interpol, the captain Zheng, Dajun smashed a drug trafficking case that their teacher Mei Jingyang couple were killed, vowed to catch the killing of the mentor 's murderers. Zheng Dajun soon discovered that the suspect, an escaped outlaw Black Tiger. Shen Dong key for the killing of a teacher so great psychological impact , want to be able to get rid of the shadow of a crime to make a "good man". However, his adoptive father, Tsang Ouyang extremely dissatisfied with the practice of leaving MEI Xue Shen Dong key pain suffering, on the one hand, confrontation with the police to hide the black tiger ; the one hand , he redoubled care of MEI Xue , the mental balance of the own ...