Kim Ji-ho

On his way to work, a bank manager receives an anonymous call claiming there's a bomb under his car seat, and if anyone exits the car, it will explode unless he can pay a ransom.

Amid a coup, a North Korean agent escapes south with the country's injured leader in an attempt to keep him alive and prevent a Korean war.

On a live music radio show, a letter arrives from the 23 years in the past. Through the letter, the first love and friendships of five friends are revealed.