Rain-soaked night murder attempt unravels when father-daughter detectives Lao He and He Ying, grappling with impending retirement and fractured familial bonds, confront a case entangled with their past as suspects lead to the shadowy secrets of the Han Dong couple they once knew.

현 씨 집안의 동생을 괴이하게 살해 후 시체를 유기한 팔각정 미제사건. 19년 후 마을에서 다시 괴이한 사건이 발생하자, 흩어졌던 현 씨 가족들이 다시 모이고 사건의 진상이 밝혀진다.

Ph.D. candidate in Physics Mu Cheng He catches a third-year student in English Xue Tong cheating on an exam. When he even becomes the substitute teacher in her elective course Russian and makes her study with him after classes, her hatred for him only grows. Over time, however, Xue Tong discovers Teacher Mu’s true character and comes to secretly love him.