Seonyoung, who starts counseling Ji-seok after causing trouble in the military, is plunged into torment as she recalls her dark past. From that moment, the boundaries between counselor Seonyoung and Ji-seok begin to blur, revealing that the nature of their entanglement is too complex for binary values to judge. The film conveys the idea that humans are indefinable beings, delivering a sense of fear and horror within the confined space of a small room without relying on overtly terrifying scenes.