Mun, a 20-year-old violinist who went blind at the age of two, underwent a cornea transplant and regained her sight. During her rehabilitation, she discovers that, in addition to real objects, she sees inexplicable phenomena. Mysterious figures—children and adults with deathly pale faces—follow her literally everywhere.

Moreover, it turns out that Mun sees not her own reflection in the mirror, but the face of Lin, whose cornea was transplanted into her. And Mun, in order not to go mad, sets out in search of Lin…