Do-kyeong (Sin Won-ho) who is fresh out of the military meets mysterious Ga-in (Kim Hwa-yeon) on a boat to a deserted island. He is attracted by her fragility and thinks she might disappear soon. That evening, the two of them meet again at a bar called Yubari and spend the night together. Ga-in has a growing passion inside of her and Do-kyeong struggles to free himself from her obsession.