Chen Kuan-Tai is Big Brother Cheng, a former refugee who runs a local teahouse in Hong Kong. Respected by his peers, Big Brother Cheng runs the teahouse - and unofficially the neighborhood - with a firm righteous hand. However, when the triads come calling, Big Brother Cheng finds out respect and common decency may not be enough. The triads use underage kids to terrorize the teahouse, and since the law won't do anything, Big Brother Cheng may have to step in and take care of it himself!

陈观泰饰演的大哥成，为了义气而重出江湖，向恶势力挑战；期间揭发一宗大骗局……斗智斗武的过程中，他的妻子（叶灵芝）及伙伴黑仔文（汪禹）相继被杀害。大哥成复仇后，巧妙避过了警方的线眼，再度退隐江湖……