​The piano arrived in Korea in 1900, about 200 years after its invention. The first people who saw the piano people who first saw the piano were said to have heard an unintelligible sound coming from inside the barrel and called it 'ghost barrel'. 'Ghost Barrel' is a music documentary that retraces the footsteps of the piano in Korea over the past 120 years. The journey 'Ghost Tong' follows pianists Won Jae-yeon and Kim Jae-won, musicologist Heo Ji-yeon, piano tuner Yang Hyung-joo, carrier Cho Hyung-chun, Kim Ki-seon, and Kim Sung-jong, a piano tuner, repairer, and distributor. past, present, and future of the piano.