The ordinary college kid Hyun-soo is excited to meet up with his friends at a pool party. To go there as fast as possible, he takes his father’s cab without even asking. As he was driving through town, a girl mistakes his cab as on-duty and hops in. Although Hyun-soo could’ve said no, he takes the girl and spends a nice night together. But that single choice he made, turns his life completely upside down.