Shine on You

Dong-jin mysteriously disappears, leaving Eun-sil deeply worried about his fate. Desperate for answers, Eun-sil implores Joong-hyuk to use his detective skills to find him. As Joong-hyuk delves into the case, he recalls the past with Dong-jin, uncovering hidden clues Dong-jin left behind. In the process, Joong-hyuk uncovers Dong-jin's statistical analysis and decides to test it by approaching Mi-jung.