To trumpeter Hyeon-Woo, life seems to remain forever locked in winter. In desperation, Hyeon-Woo signs up for a position teaching a children's wind ensemble at a small junior high school in a distant Dogye village. Worn-out instruments, tarnished trophies and frayed certificates testify to the poor conditions of this ragtag group. This leads Hyeon-Woo, together with his students, to take on a seemingly impossible challenge.