Ladies Market

Tung lives illegally in Hong Kong's 'Ladies Market' after having been taken in as a young child by Shan Lao, a kind street hawker. Living together like a father and son, they are blissfully unaware of the illegal activities occurring around them until Tung happens across a younger girl in the old warehouse that he frequents. Meanwhile, childhood friends Pui Yee and Chi Ho get caught up in a diamond theft. When the pair runs into Tung and Yan Yan, the four find themselves on the run from both the gangsters and the police.
(Source: Chinese = Douban, Singtao || Translation = olivestulip at MDL)