Episode 4

S1 E4: Hong Bin encounters a crisis during which the truth that blades come out of his body is nearly revealed. Thanks to Secretary Go, the only person who knows of the secret, Hong Bin narrowly escapes the crisis. But Hong Bin, aware the series of recent strange incidents are related to him, presses Secretary Go and begins to fit together the fragmented pieces of vague memories. Se Dong, officially having become Chang's babysitter, is afraid of a monster within Hong Bin's house.