Yeo-wool receives a text message from Ms. Doh and goes down to her office. But when she gets there, she finds Ms. Doh lying down on the floor, unconscious. Yeo-wool quickly calls 911, but everyone suspects her because she was the first one to find Ms. Doh. Meanwhile, Na-yoon gives her statement to the police and takes Yi-chan with her. (thetvdb.com)