Ji Hyuk now knows the person who has been leaving him a trail of clues about his lost memory. Amidst the collapse of the Foreign Intelligence Bureau, Ji Hyuk and Je Yi get one step closer to finding out the purpose behind Sangmuhoe's objective. Meanwhile, Ji Hyuk vows to keep his promise with Su Yeon. 

Ji Hyuk's memory of what happened one year ago returns to him. The truth is hard to accept. But now that he knows more about the cover-up, the motive of his revenge becomes clearer. Meanwhile, Ji Hyuk gets arrested, but Director Kang makes a deal to get him out.