S1, E2: A relationship they can’t undo begins. Who is “he” the man the four women killed? Se-yeon tracks the source of the mysterious calls with the help of Sang-hoon , while Eun-soo tries to shake off suspicion from Sun-ho, who believes she’s involved in his father’s death. Jeong-won, visiting the hospital with her husband Dong-seok about fertility issues, is hit with a shocking revelation…