During a flashback of the day Ji Cheol went to the laboratory to get tested and became acquaintances with Choi Yong Woo, Yong Woo is seen sneaking into the laboratory while the workers go on a lunch break. There, he secretly switches his name with Ji Cheol’s on the containers that have their blood samples in them. Meanwhile, Ji Cheol calls for a chauffeur, and Director Park appears.
