Nobody Knows Temporada 1 Episódio 4

Sun Woo hears from Dong Myung that he used to work part-time at Millennium Hotel with Eun Ho upon request from Chang Su, Su Yeons boyfriend. Meanwhile, with Su Yeons permission, Young Jin goes into Eun Hos house to look for a bag Eun Ho used to carry. She catches Chang Su who tries to sneak into the empty house and hears from him about what Eun Ho had found at Millennium Hotel.