Old Chen is seemingly an ordinary doorman who has worked for the Jiang family for twenty years, but in reality, he is a retired reconnaissance soldier and a first-class merit veteran. Furthermore, he has raised his three children into talents among people: his eldest daughter Chen Shuyao is the chairperson of Shuyao Technology Group, his second son Chen Mo is a lawyer at a top international law firm, and his youngest son Chen Li is the boss of Lidun Security, known as Brother Li. Yet Old Chen has always kept a low profile, willingly guarding the front gate of the Jiang family just because twenty years ago on a snowy night, the Jiang family took in their father and three sons.