Protagonist: Lin Yuan.
·Ostensible identity: The son-in-law who comes to the house, has a cowardly character and is taciturn. He was forced to marry into the family because of repaying a favor. He is responsible for cooking and cleaning in the family. He is despised by his wife and the whole family.
· True identity: The founder and sole core of the top mysterious organization [Long Yuan] that was disbanded for some reason many years ago. Codename "Long Yuan". He controls "black technology" and huge hidden forces that can shake the global economy, technology, and military.
