The members of Active Volcano once burned with a passion for the rock'n'roll life, but the college bandmates eventually drifted apart. Now in their forties, none of their lives have gone according to plan. Lead guitarist Ki-young, bass guitarist Sung-wook, and drummer Hyuk-soo reconnect at the memorial service for their lead singer, Sang-woo. Ki-young takes Sang-woo's death hard, and it sparks his determination to restart the band. With Sang-woo's son stepping into his father's role, can the members of Active Volcano take the stage once again?