Singer-songwriter Kevin is in trouble ahead of the release of his new song. As he rides his bicycle to visit the place where he performed before his debut, Kevin's mind recalls the events with the people he met on his bicycle trip in the past and he gets comforted and inspired by the times he spent with them. Kevin encounters an empty concert hall that is about to close. There, he completes his new song with the help of his best friend and colleague, Sang-wook, who died first in a car accident.

When South Korean heiress, Yoon Seri, unexpectedly crash-lands in North Korea after a paragliding mishap, her life takes an unforeseen turn.

Ja-yoon is a high school student who struggles with memory loss after she endured some unknown trauma during her childhood. While trying to uncover the truth, she is unwittingly dragged into a world of crime and finds herself on a journey that will awaken many secrets hidden deep within.