19-year-old Yoon Young lives alone with her mother and prepares for the civil service exam while working part-time. Regardless of good heart and sincere will, unexpected incidents turn Yoon Young from a victim to the killer, driving her to prison and being called inmate “2037” instead of “Yoon Young.” In a hopeless situation her co-inmates in Cell No. 12 with their own stories offer a hand of hope to protect Yoon Young…

To pay a debt, a married man receives billions of won from a woman. In return for the money, the man gives himself to the woman.

Han Ji-eun is a naive writer who got swindled out of everything she owned including her house by her best friends. Stranded in China, She managed to borrow money from an actor Lee Young-jae to return to Korea. On her return, she found out that her house was bought by Lee Young-jae. In an attempt to get her possessions back, she entered in a contract marriage with Young-jae for one year. In spite of losing all, Ji-eun manages to be cheerful and takes things in strike and the business relationship between the two becomes personal as they start to rely and care for each other.

When Jo Gang-Ja attended high school, she was notorious for fighting. She gave birth to her daughter A-Ran in her late teens and became more responsible. Her daughter A-Ran is now a high school student, but A-Ran is bullied at school. Jo Gang-Ja decides to go back to high school to protect her daughter. Jo Gang-Ja becomes a high school student again.

A family has been dismantled by revenge and hate, but Geum Sa-Wol (Baek Jin-Hee) attempts to build up a dream house for the dismantled family.