The One’s 30th anniversary event is only a few days away. To make the event a success, Young Eun and her team members work hard and try to invite Hye Rin, a popular influencer, as the model of their new clothes. However, things aren’t going well as Hye Rin is being very picky and uncooperative. Only one day is left until the event, and Young Eun comes to make a big decision. Meanwhile, Jae Guk finds out who bought his photo in Paris ten years ago.