Past and present survival of the common man in the big city – ups and downs, laughters and tears…

In 1970s Hong Kong, rapacious landlords try to evict 72 tenants but sworn brothers Ha Kung (Eric Tsang) and Shek Kin (Jacky Cheung) help the group of 72 defeat the landlord (Lam Ka Tung) and landlady (Charmaine Sheh) and coincidentally rescue Pinky (Anita Yuen) from a planned forced marriage. When both sworn brothers fall for Pinky and propose to her, she flips a coin “heads or tails” and Ha wins her hand in marriage.

The sworn brothers become sworn enemies and Shek’s hatred fuels intense rivalry against Ha in business dealings ranging from the manufacture of plastic flowers to the selling of stinky bean curd. Even after 40 years they continue to clash and in 2010 they are in keen competition selling electronics appliances in Sai Yeung Choi Street, Mongkok, the busiest street in the city and still home to the 72 tenants.