Hyun-woo, just being 20, celebrates the birthday of his college friend. Hyun-woo and his friends drink together and go to a cheap motel to do prostitution. Hyun-woo says no. But he, carried along by the atmosphere, follows his friends. Woman enters the room 305. He is shocked. Because she just looks like his mom whom he lost when he was a baby. He runs away from the motel. But He can’t stop thinking about the woman and goes to the motel, again.