A man named KIM jumps into the dark, quiet waters of the Han River. He wakes up and finds himself lying on covered with sand. It is then that he realized that he failed to kill himself and simply drifted to an unknown island in the river. In one of the riverside apartment buildings, there’s a girl who hasn’t ventured out of her room for years. One day, she catches sight of a man living alone on an island through her binoculars and becomes intrigued. Day after day, his lonely but seemingly contented life triggers her curiosity and compels her to step out of her room after so many years.