Missing and death cases take place in succession along the Korean Demilitarized Zone. South Korea forms a unit led by Captain Jo Jin-Ho and First Lieutenant Shin Yoo-Hwa as assistant leader. They are given only 24 hours to find out the truth behind the incidents. Team members find evidence, but they feel like something isn't right.

Since 2 years ago, Haneul has been teased by Chiwoo who is a delinquent in his school. In the opening day of third grade, Haneul meets his middle school friend Myeongho who was moved from other high school. From that time, his school life had changed. He gets close with new friends, goes out with a girlfriend, draws cartoons, and enjoys summer time. While he enjoys a new happy life, things are suddenly getting wrong. Chiwoo prepares revenge on Myeongho and Haneul’s other friend Minsik who falls in love with Myeongho’s girlfriend. They provoke Hanuel into a fight because he is an easy mark.

When an American fitness club opens a branch in Korea under corporate pressure, a new manager comes with it. With a wonderful, distracting new figure, Manager Jenny has the attention of all of her staff.