『野花區(qu)(qu)一(yi)(yi)區(qu)(qu)三區(qu)(qu)四區(qu)(qu)』介紹:退(tui)休警(jing)(jing)察豹叔膝下有兒子阿(a)(a)(a)(a)(a)國(張國強 飾)和養子阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)(劉德華 飾),阿(a)(a)(a)(a)(a)國曾(ceng)是國際刑警(jing)(jing),如(ru)今返港(gang)擔(dan)任督察;而阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)則混跡黑道(dao),雖然收入豐厚并頗得老板楊東海(hai)賞識,但阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)拒絕(jue)販毒令楊東海(hai)很為難(nan)。阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)與阿(a)(a)(a)(a)(a)國情同手足,但并未打探(tan)彼(bi)此工作。不(bu)久,阿(a)(a)(a)(a)(a)國受命調查楊東海(hai)一(yi)(yi)伙,同時阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)中了楊東海(hai)苦肉計(ji),不(bu)得不(bu)與毒販接洽,結果(guo)引發血戰。背負殺人嫌疑的(de)阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)被阿(a)(a)(a)(a)(a)國追索,僥幸逃脫后(hou)連(lian)累(lei)后(hou)者遭警(jing)(jing)隊處(chu)罰。另一(yi)(yi)方面(mian),阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)和阿(a)(a)(a)(a)(a)國在警(jing)(jing)隊中的(de)對頭步(bu)步(bu)緊逼他們,最終身死,而阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)的(de)女友雯雯(蕭紅梅(mei) 飾)為阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)幾次犯(fan)險,阿(a)(a)(a)(a)(a)定(ding)(ding)(ding)不(bu)忍棄她(ta)而去(qu)獨自(zi)出國避(bi)禍,