A special story of ordinary people who wanted to live in the ordinary begins!
A hardcore detective who loyal to the nation,
The most common man of house sang-jin (Son Hyun-joo), whose desire to live in a two-story dormitory with his son and wife.
Sung-jin arrested suspicious suspect, Taesung (Cho, Dang-hwan).
Sung-jin noticed that is the first serial muder case in Korea.
As a result, he joins deeply without knowing himself. the secret duties led by Gyeongnam (Janghyuk).
On the other hand, A freelance reporter (Kim Sang-ho) who close with Sung-jin.
During the interview, Sang-ho noticed the suspicious sense of this incident and said to Sung-jin to release that case.
Sung-jin, who has been promised the operation of his uncomfortable son, accepts Kyung-Nam's uncomfortable proposal.
As a father, he has no choice but to do.
This is put Sung-jin and his family at greater risk and begins to shake his life ...