
Jae Wook parked his car in the parking lot. As soon as he came out, he felt the existence of Ji Sang. Therefore, he looked over and found Ji Sang already in vampire mode. Jae Wook frowned seeing Ji Sang standing there, and looked shocked as Ji Sang ran towards him to attack him. He tried to cry Ji Sang's attack.
Ji Sang landed. Bloody nails. Jae Wook's cheeks looked bloody. Ji Sang again attacks and strangles Jae Wook who has not changed his vampire mode.
After Woo Shik's wife decides to let Hye Rin take Woo Shik to ward 21A, Ji Sang meets him. He's trying to change his wife Woo Shik's mind. As the person in charge of Woo Shik, the wife refuses Ji Sang's request. Because, the offer given by Hye Rin is much more convenient, such as free medical expenses and some other conveniences, although he does not know what kind of ward 21A is.
Seeing his wife Woo Shik's reaction, Ji Sang is upset. He's looking for Jae Wook. So angry, he did not even touch Ri Ta who passed him. In Ji Sang's head there was only one question he had to ask: what is ward 21A for?
Ji Sang just got to meet Jae Wook in the parking lot. As soon as Jae Wook gets out of the car, Ji Sang shows up. Without warning, he attacks Jae Wook. The attack goes in several times, so Jae Wook slams several times to the ground. “What's wrong with you?” ask Jae Wook.
Ji Sang gave no answer. She runs and pushes Jae Wook's body down. Afterwards, she approaches and strangles Jae Wook. “Tell me the truth, what are you doing in ward 21A?” ji Sang asked in a tone full of anger, “That's related to our virus right? Say now?!” Jae Wook takes his hand off Ji Sang's hand and justifies what Ji Sang questions.
Ri Ta tried to contact Ji Sang's HP, but the owner was turning it off. He recalled how tense Ji Sang's face was when telling him to step aside from his path.
At his residence, Jae Wook explains that what he did in ward 21A was to manipulate the causative factors of the virus by utilizing the patient's antigens and antibodies. He knew it was dangerous. That is, he tried his best to minimize the risk. Ji Sang questions Jae Wook's last statement again. The reason is, there have been two patients dead or dying from diseases that appear suddenly. He also mentioned that some patients experience tinnitus and are sensitive to light. “You know these are the symptoms of VBT-01 infection?” Ji Sang is accusing.
Jae Wook defended himself by stating that the symptoms appeared in the early stages. A week later, the symptoms disappeared and the patient returned to normal. He asked Ji Sang to check it a few times ahead, as the trials were almost done. “If successful, humans will be free from disease. They will live more than 150 years.”
Ji Sang accused what Jae Wook did in ward 21A of being crazy. Moreover, Jae Wook uses patients who do not have families, parents, orphans, the homeless, etc. “I give them hope that we get results,” Jae Wook said. Ji Sang judged it another way: Jae Wook is arrogant!