Taewoo and Hazel were stationed in the base of NIS Korea in England, where they found themselves under the watchful gaze of their leader in Korea, Miss Aimin. She was known for her meticulous monitoring and keeping a watchful eye on her agents during missions across different countries. Her intent was clear: to ensure her agents stayed focused and didn't get distracted.

Meanwhile, in their base camp, Hazel handed Taewoo a comprehensive record of all the former workers from the agency where the stolen map originated. A mysterious call from England had suggested that someone knew the map's location. As Taewoo pored over the files, he noticed a person named Kate, who had worked in the agency in Korea but left just a day before the incident, eventually moving to England. Taewoo found Kate's official address and set out to investigate.

While in the subway, Taewoo accidentally bumped into a man wearing a black tracksuit, cap, and mask. The man claimed that Taewoo had dropped an envelope. Taewoo denied it, but the persistent man thrust the envelope into Taewoo's hand before disappearing into the crowd. Opening it, Taewoo discovered his name on the black envelope. Inside, a chilling message awaited him: 'You are not a devil, but you met one, so now you have to die.' He discarded it, suspecting it might be a trap set by Miss Aimin to test him.

In another setting, Chin sat with a man in his mid-fifties in an apartment, reminiscing about the Sundays when he used to visit her family, and her mother would bake cupcakes. She gently asked her uncle about her mother's last message to inquire about her death from him. Her uncle replied: chin ,although we both were very good friends but she never told me anything that was disturbing . Chin: then why did mom ask me to meet you and MISS RED, to know about the reason behind her death. Uncle: Chin i dont know how to tell you but.....(they both talked for an hour after which chin left his apartment).

Taewoo arrived at Kate's address, witnessing a girl leaving the building with blood-stained shoes. Ignoring her, he entered Kate's apartment, only to find a gruesome scene. Blood spattered across the room, a lifeless body lay on the floor, a knife plunged into it, and a black rose by its side.

Meanwhile, back at Chin's place, her mother informed her that a lawyer was waiting to speak with her. Chin met Mark, who wa sitting in the guest room in a very royal manner. His gaze fell to her white sneakers, chin noticed his gaze and justified her self : "Oh , that is not blood my uncle dropped kiimchi on them", at which MR Mark replied :" i never asked". while chin passed the remarks with a smile ,Mr .Mark mentioned a case he was working on, subtly hinting at her mother's suicide. Chin grew defensive but maintained her silence, and asked him to leave at which Mark left his business card behind and told her to wait until he meets her again. As he drove away, he received a call from an unknown number. A mysterious voice on the other end spoke of Mark's proximity to Chin and urged him to kill her. Mark refused saying :"she is more interesting than I thought she will be".