RecordIng engIneer Seong-hyeon is troubled by a request for post-production dubbIng. The leadIng actress, Mi-jeong, has passed away, and no one knows the content of the ad-libs she performed In a crucial scene of the film. MInor actress MIn-young visits Seong-hyeon’s studio to record Mi-jeong’s lInes, but the director who was supposed to come is nowhere to be found. HummIng stimulates a sense of mystery and imagInation agaInst the backdrop of a secluded hill and a shabby recordIng studio. The film IntertwInes conversations between Seong-hyeon and MIn-young, Seong-hyeon’s memories of the deceased Mi-jeong, and scenes from the film Seong-hyeon and Mi-jeong worked on together, placIng itself at an angle between reality and cInema, life and death. It unfolds like a languid and bizarre midday farce or a chillIng and sorrowful ghost story, gently touchIng upon the secretive and significant moments of the world.