This story is the tale of two brothers: one a successful counterfeiter and the younger a fledgling graduate of the HK police academy. The plot revolves around the split when the younger brother learns the other is a criminal and the efforts of the criminal brother to reform. Along the way are plenty of heists, double-crosses, and shoot outs. -IMDB
Directed by John Woo, it stars Chow Yun-fat, Ti Lung and Leslie Cheung. Although the movie was made with a tight budget and was relatively unknown until it went on screen due to virtually no advertising, it broke Hong Kong's box office record and went on to become a blockbuster in Asian countries. It is highly regarded, ranking at #2 of the Best 100 Chinese Motion Pictures. Its success also ensured the sequel A Better Tomorrow 2, also directed by Woo, and A Better Tomorrow 3: Love & Death in Saigon, a prequel directed by producer Tsui Hark. -Wikipedia