A memorial service for Fei Ke brings together female journalist He Shan and four strangers who are invited. They all share undisclosed pasts with Fei Ke, but they discover that the Fei Ke they knew is not the same person. Who is Fei Ke really? As they look back, the group gradually uncovers the truth about Fei Ke.

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.