
Hyun Woo tells Ri Ta that Ji Sang can't seem to have surgery because he starts to react to blood. In fact, even though the drug is no longer effective. He said, “Though so, Ji Sang has great self-control. Retaining drug will not work without self-control.” Ri Ta asked a lot, ranging from atisan medicine, Ji Sang's Mother-Father, etc.
Hyun Woo was reluctant to answer. In the end, he explained the atisan medicine was made by his mother Ji Sang. He added both of Ji Sang's parents were researchers, who were infected with VBT-01 and are now dead. “Since they are infected, may not their death be natural?” ask Ri Ta full of inquires, “How did they die?” Just about to answer, Ji Sang's voice sounded.
Ri Ta also talked to Ji Sang, and asked him not to just leave suddenly. He demanded an explanation from Ji Sang regarding his attitude earlier. Ji Sang admits to being only angry, after learning Woo Shik was transferred to ward 21A without her consideration. Ri Ta scrunched her forehead, followed by asking why Woo Shik was transferred to the ward? Ji Sang replied because they could do nothing, while ward 21A offered hope.
“They wear Woo Shik as a test subject? Jae Wook and Hye Rin are absolutely outrageous!” pekik Ri Ta's. Ji Sang calmed him down, asking him not to get angry. But, Ri Ta flipped. What Ji Sang needs to worry about should be himself. Ri Ta asks if Ji Sang is angry again you should just contact him.
“Why should it be?” ask Ji Sang. Ri Ta asked Ji Sang to just do it. He left after receiving Ji Sang's explanation.
“This is what we feared would happen. Someone is using the VBT-01,” virus Hyun Woo said. Ji Sang explains that Jae Wook did not use the virus to infect them. Hyun Woo said that the main problem was not infection, but mutation. He explained that Han Su had warned against using the virus for treatment.
“What if we are wrong about everything?” ask Ji Sang. The question made Hyun Woo point out that Ji Sang was starting to be as thoughtful as Jae Wook. Ji Sang dodged. He claims to only judge rationally. Hyun Woo stays to his understanding that viruses are very dangerous and reminds Ji Sang of the difficulty of living with them. He invites Ji Sang to stop being curious about all the resources he has. But, before doing so, they must figure out what Jae Wook's goal really is.
Ri Ta studies atisan at her home, where the ingredients Hyun Woo has given her. After stabilizing some important words in the book, she remembers Ji Sang starting to react back to the blood and Hyun Woo mentioning Ji Sang's self-control is really strong. Atisan won't work if an infected person's self-control is weak. He also remembered when Ji Sang reacted to see Ja Bok's blood. Just then, he clasped his hand and Ji Sang returned to his consciousness.
The next morning, Ji Sang asks Hyun Woo not to reveal his secret to Ri Ta? Hyun Woo confidently agreed, there was nothing he could reveal to Ri Ta. LUVVY came and showed on the screen that Hyun Woo had Ri Ta ask what he wanted to know about Ji Sang. It irritates Ji Sang and chases Hyun Woo to get hit by the shoes. Snicker.