When viewed in public, the Kim's seem to have the perfect marriage. In private, however, their married life is filled with turbulence, fighting, cheating, and accusations.

Sang-hyun is always struggling from debt, and Dong-soo works at a baby box facility. On a rainy night, they steal the baby Woo-sung, who was left in the baby box, to sell him at a good price. Meanwhile, detectives were watching, and they quietly track them down to capture the crucial evidence.

A North Korean diplomat defects to the South during the Cold War, but the South Koreans have their suspicions as to whether he is an actual defector or a double agent.

Eighteen year-old Tae-hoon and Mi-jung have been going out for 100 days. During winter break they decide to take a trip to the beach to celebrate their anniversary. When they are back home after a few days, they have to confront a harsh situation – Mi-jung’s parents don’t allow them to see each other until they become college students. Tae-hoon struggles to keep their love and wanders around Mi-jung but she is eventually changed and avoids him as her parents wish. Winter turns to spring, and Tae-hoon and Mi-jung both turn nineteen.

Go-ni tries his best to worship Pyung Gyung-jang as his teacher, and promises to stop gambling after winning his money back. But people's desires are endless.

In 1782, King Jeong-jo of Joseon asks detective K to investigate a series of murders related to a case of corruption within the government.