In 1970s Hong Kong, the Independent Commission Against Corruption (ICAC) was formed to bring down the corruption syndicate led by British government officials. One of its top investigators is Senior Investigator Lau Kai-Yuen, who brought down countless corrupted officials. Just as he thought stability and prosperity are within reach, a new era of greed and riches takes him into a new battlefield of corruption.

Hong Kong Customs and Excise Department officers Chow Ching Lai and Cheung Wan Nam share a close mentor-student relationship. On a case involving seized smuggled arms, Chow is sent to take part in a joint operation with Interpol to capture a reclusive arms dealer. However, Cheung makes a drastic decision that further complicates the case.

In this classic whodunit, a police detective must rely on the only witness - a parrot, to catch the killer of an armed robber.

Changing times and cultural landscape lead to differences in musical taste. Ah Ning wrote Cantonese pop songs in the 1980s, and revels in the glory days of “good music”. The music scene changes, and he falls into oblivion. A piece of bad news leads to a brief reunion with his daughter Lok Kei after ten years of separation. Lok Kei is now a big fan of K-pop which Ah Ning despises and considers empty and repetitive. Just like in many generational conflicts, through their love for each other, Ah Ning and Lok Kei try to unravel all the hidden truths and misunderstandings in their limited time together.

Gun is a loan shark. Having worked hard for years, i.e. intimidating and threatening his debtors, he musters just enough money to purchase a house for the family. The plan is at risk, however, when one of his debtors dies and Gun discovers that he is not the only creditor. Out of desperation, he asks for his daughter’s help, who is unwilling to be involved in her father’s shady business. The simmering tension causes a rift in the family.