Five high school teens on their way to college. But gradually they go through the struggles of life and end up discovering who they are and what it is they truly want in life.

A baker Chu Noh-myung is worried because his wife, Jung-hee, has been sighing quite often. He is relieved but also jealous when she smiles deeply for Mu-suk, a far-from attractive customer at their bakery. As the daily buying-and-selling becomes more frequent between the rather mismatched Jung-hee and Mu-suk, their feelings for each other deepen.

The awkward, distant, and wounded three sisters gather at their hometown for their father's birthday. However, on the day of the party, there is a big mess because of their little brother Jin-seob's abnormal behavior, and the past of the three sisters slowly reveals.

A CEO of a small tech company, Chang-wook, must win billions worth bid for National EV charger project against Gwang-woo, an ex-business partner who has thrived with lobbying after stealing Chang-wook's original technology. Discovering Gwang-woo's secret connection with the decision-maker Minister Cho, he plans his first-ever golf outing to win over the deal. Finally, the golf round day has come, but everything is not the way he planned. Scandal, betrayal and chase in this 18-hole round.

An aspiring songwriter who ekes out a living by composing music for commercials, can no longer bear the many compromises that line of work demands and decides one day that enough is enough. As he reminisces about his college years, he leaves the city for his hometown.

After the assassination of President Park, martial law has been declared. A coup d'état bursts out by Defense Security Commander Chun Doo-gwang and a private band of officers following him. Capital Defense Commander Lee Tae-shin, an obstinate soldier who believes the military should not take political actions, fights against Chun Doo-gwang to stop him. The conflict between the two grows while military leaders are holding their decision and Defense Minister is gone. In the midst of chaos, the spring of Seoul that everyone longed for heads to unexpected direction.

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.

Kwon returns to Seoul from a restorative stay in the mountains. She is given a packet of letters left by Mori, who has come back from Japan to propose to her. Kwon drops and scatters the letters, all of which are undated. When she reads them, she has to make sense of the chronology.

Choi Ik-Ho is a martial arts star with talent for action and humor. But one day, he is framed for murder. Ace is a game planner, who makes a game for the Korean upper class. He is a villain who makes a city into a big gameboard through technology. Ace and Choi Ik-Ho become adversaries as Choi Ik-Ho jumps into the game to save his brother.