A CODA (child of deaf adult) student born with a gift for music crash lands at an unfamiliar place after time traveling through a suspicious music shop. There, he forms the band Watermelon Sugar with other mysterious youths.

Changsu happens to get a special perfume. The perfume has a special thing that appeals to women. Ara is also attracted to the perfume and meets Changsu

While investigating a terroristic threat that goes viral online, Korean authorities discover that a suspect has recently boarded an international flight bound for the United States. When a healthy passenger on the same flight suddenly dies a gruesome death of unknown cause, panic erupts both in-flight and on the ground. With steadily decreasing fuel and international refusals to offer aid, the captain and crew will be forced to take unprecedented emergency measures in an attempt to save the lives of their passengers.

In disguise as her friend, Ha-ri shows up to a blind date to scare him away. But plans go awry when he turns out to be her CEO — and makes a proposal.

In the present day, Jang Bong Hwan works as a chef at the President's Blue House. She has a free spirit, but her spirit somehow finds its way into the body of Queen Kim So Yong in the Joseon period. King Cheol Jong has secrets. He seems like a figurehead, who is gentle and easygoing. In fact, he hides his strong aspects. Queen Sunwon is the late King Sunjo’s wife. She wields the true power in the country and, thus, relegates King Cheol Jong as just a figurehead. Kim Jwa Geun is Queen Sunwon’s younger brother. He is extremely ambitious.

A coming-of-age story about the lives of 18-year-old high school students who are valued according to their ranking in school. Despite their frustrations, they find out how to make their own way in this world that seems to be a stagnant cycle of school and home.