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.

A group of former mercenaries reunite to plan an epic heist: boosting a truck full of medicine held by a foreign intelligence agency to supply a refugee camp in need. But when they find the truck is actually filled with stolen gold, the band of brothers realize they’ve been double-crossed by one of their own – and putting the situation right will be all out war.