Jin-a (Lee Ji-eun), a 22-year-old prostitute, arrives at a small seaside motel called the Birdcage Inn to replace the previous one. The inn is run by a couple who have a daughter and a son. They provide Jin-a with room and board and make a living by renting out rooms and taking a cut of the money she earns. Jin-a works at night and spends her daytime drawing and watching the sea.