Dong-ju visits his old high school's principal and sees a photo of a man who looks exactly like Ki-jeok. He asks around and finds out that the man in the photo is Lee Kang-san who went missing in 1995 with his brother, Lee Ha-neul. Meanwhile, Ki-jeok tells Dong-ju that his memories are coming back and that he remembers meeting Dong-ju's father.

Dong-ju realizes that the videotape No Myung-nam mentioned could be important evidence, so he looks for it. Ki-jeok visits Woo-jung's cafe and sees the photo of Kang San, which brings back some of his memories. Meanwhile, during Dong-ju's book signing event, a mysterious man drops by and leaves him a note.