It is Christmas Eve of 2025. BF showcases its new product. Everyone praises Ja-yu, the CEO, but the primary industry suffers because of BF.

Chae-woon becomes Ja-yu's bodyguard. They fix the hacking but realise governmental power is needed. Ja-yu asks Seonu Jae, the prime minister, for help.

Ja-yu digs into Chae-woon's past. She finds out that he was present with her during the terrorist attack that involved the president a few years ago.

Seon Woo-geun, the chairman of DORSON Group and Seon Woo-jae's biological father, suggests that Ja-yu sells her cultured meat technology to him.

Chae-woon is critically injured during the shoot-out. Chae-woon recovers swiftly but there seems to be something wrong with his hearing.

The hacker's body is found. Ja-yu doesn't understand why he attacked her and her company. Chae-woon and Ho-seung retrace the hacker's steps.

Convinced that she did not orchestrate the bombing, Chae-woon tells Ja-yu about the possibility of a spy in BF. Seon Woo-jae learns about Chae-woon.

To unveil the spy's identity, Chae-woon reveals the real reason he joined BF. Recognising the one who sent him, she feels betrayed and fires Chae-woon.

Chae-woon parts ways with Ja-yu to find concrete evidence. He makes a promise with her before leaving.

Ja-yu, critically injured, undergoes surgery on the operating table in BF's basement.