Stuntman Cha Dal-geon gets involved in a tragic airplane crash and ends up discovering a national corruption scandal in the process. Go Hae-ri, the oldest daughter of a deceased marine, decides to work for the National Intelligence Service as a secret ops agent in order to support her mom and younger siblings, although all she wanted to do is to become a civil servant.

Set in a village right after the Korean War, poor but good-hearted Heo Sam-gwan sets out to win the most beautiful girl in the village, Heo Ok-ran, by selling his blood to earn money. Years later, the two are happily married with three children, but their family undergoes a crisis when Sam-gwan’s eldest son doesn’t resemble him and rumors spread about the boy’s paternity.

Ok Da-Jung is the youngest team leader in the cosmetics industry. She has divorced three times so far. She doesn’t care what others think about her and she also has quite a temper. Nam Jung-Gi works as a section chief at the same cosmetics company as Ok Da-Jung. Unlike her, Nam Jung-Gi has a timid and nice personality. He can’t say anything that makes others uncomfortable. He is able to make Ok Da-Jung’s blood boil.

HONG Gildong is an infallible private detective with an exceptional memory and quirky personality. While chasing the only target he failed to find, he gets entangled in a much bigger conspiracy than he bargained for.