Sun Hwa saves Hyun Joon from being discovered by Seung Hee. Hyun Joon wants to go back for Seung Hee but Sun Hwa convinces him to leave.
NSS headquarters is thrown into chaos with the terrorist attack and Hyun Joon and his group use that to help them escape.
Baek San tells the president that the terrorists stole a detonator from NSS that can be used with a nuclear bomb.
Sun Hwa unlocks the file for Hyun Joon and discovers that it contains info on Baek San and his involvement with IRIS. It also contains info on Hyun Joon's parents. They were nuclear scientists who Baek San had killed.
Seung Hee comes to the conclusion that Hyun Joon was the terrorist she encountered inside NSS and digs deeper into his death. She confirms that the report of his death was fake.
Park Chul Young secretly meets with the terrorists. To thank Hyun Joon for his help, he tells him he's free to move about as long as he's with Sun Hwa.
Hyun Joon goes to the orphanage where he grew up and finds the head priest dead.