Cheung, a single mother living in an area with high crime rates, works hard to provide for her son while helping out her elderly neighbor.

Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

1996 Hong Kong film directed by Peter Chan

The relationship between a middle-aged man and the elderly woman who has been the family's helper for sixty years.

1996 film by Vincent Kok, Stephen Chow

2012 Hong Kong film by Roy Hin Yeung Chow

《香港人和事》内容简介：一九九七年，在香港从事文化活动超过半个世纪的罗孚，邀约二十多位香港作家，写下他们怀念中的人和事，所写的都是真人真事，且都是名家写名家，不作虚构，但在表现的方式上，个别可能像小说，原则上还是实事求是的写实。有些东西原来都存在我们的历史和我们日常生活中，时间令人遗忘，但也是时间提醒我们记住历史，令我们有了记忆。

2010 film by Pang Ho-cheung