JI Hoon is a talented musician but cannot perform in front of others due to some reason. One day, Min-su, who was once a top-notch producer, suggests him a road trip of 10 gigs after listening to his music by chance. JI Hoon hesitates due to his stage fright, but Min-su comes up with an idea, which is singing inside a box. The only thing they have in common is music, will they be able to complete the 10 stages as promised?