A woman gets help from an unknown man and becomes a successful screenwriter and lives a happy life. Later, she remembers the unknown man and decides to find out who he is.

Sun-joo is busy preparing for her upcoming wedding. But her fiancée Ji-hoon plans to go on a business trip with the beautiful writer So-ra who turns out to be Sun-joo’s best friend from before. With all the doubts and jealousy, she lies to So-ra and accompanies her in place of Ji-hoon. But on their way she realizes that the memory about their dearly friend Yeo-eun, who died in a tragic accident, are quite different. What really happened to them? Can they reveal the untold truth?

To Joo-young, Korea’s first Olympic gold medalist in women’s curling and the skip (captain) of the team, the Olympic medal was everything. She quits curling with a sense of responsibility and guilt after her teammate’s suicide. Living as a high school curling teacher, she accidentally meets Hyuk-soo, the coach related to her teammate’s suicide. After the encounter, Joo-young can’t stand Hyuk-soo anymore as he even threatens her students. She decides to disclose who he really is and starts a new plan with a helper…

Unlike Gi-hoon, who is happy running a noodle shop with his mother in their hometown, Ji-eun distances herself from her family due to her ambition to succeed as an idol singer. The siblings, who have been hurting each other more than showing love, find their conflict deepening with the news of their mother's Alzheimer's, whom they thought would stay young forever.

In a near future Korea, where an "oblivion virus" which causes memory loss has become the centre of a tourist industry aimed at those who wish to forget the past, Anna Kim, a German woman of Korean descent, seeks the virus in order to erase painful memories and, along the way, develops a close bond with her driver and her teenage guide.

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.

When cartoonist Hyun-joon falls in love with Da-hong, one of his fans, it sets up the archetypal battle between their two families, who are from rival regions. Hyun-joon comes from the politically liberal Honam region while Da-hong comes from the conservative Yeongnam region. When the two declare their intention to marry, they are confronted with a seemingly endless number of barriers that threaten their happiness.

Il-do was a promising Seoul police detective, but is now forced to work as a traffic cop in his hometown. There he meets his old love rival and ex-best friend Ho-cheol. He is now a taxi driver, adding renewed fire to their conflict.

An unemployed man and an underaged girl bond over the drama in their personal lives.