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.
Once famous for his quick blade, a retired assassin can no longer earn a living with his cut-throat skills. Summoned again, he partners with his chauffeur to carry out special missions – fullfilling the wishes of old people looking to kill themselves. When commissioned by a young girl who has been deserted by her parents and lover, the "Elderly's Angel" squad finds an arresting way to complete its task.
