Corrupt detective Han Jong-sik (Kim Seung-woo) takes care of a gang and gets kickbacks to save his daughter. One day he gets news from the organ transplant coordinator that they have found a heart for his daughter (kim Sae-ron). However, he finds out the donor is magician Na Sang-man (Son Byeong-ho) who he put false charges over and was in jail. Sang-man lost his young daughter and wife and became a vegetative state himself. Jong-sik guesses he wouldn’t allow the transplant so he plans a way to get rid of him. Just as Sang-man is about to go over in the hands of a gang and get surgery, he realizes the plan and disappears with Jong-sik’s daughter.
This film follows the story of “Chief” Cho Min-hyuk (Baek), a middle-aged corporate manager nearing his retirement after working for 30 years in the same company. Cho and other colleagues in the office secretly have held dreams of being rock musicians but they suppressed those ambitions in order to get stable office jobs and support their families. During the film Cho and others resume their interest in playing musical instruments and form a band together. However Cho struggles to deal with office politics that result from his upcoming retirement as well as the anxiety for his and his family’s future post-retirement.