Dong-hwan, having inherited his blind artisan father Yeong-gyu's seal engraving studio, persuades his father to star in a documentary about his life as a master of the craft who has overcome the limits of his disability. But the shoot takes an unexpected turn when the remains of their wife and mother are discovered after forty years. As Dong-hwan uncovers long-buried family secrets, he also unravels the story of a woman whose face has been erased from collective memory and remembered solely as an "ugly monster."