Set in two different periods, in the futuristic South Korea in the year 2102, Baek Soon Jung is a test subject that is sent out on her first mission as a secret undercover spy to travel back to the Joseon Dynasty for the secret organisation's ideas and plans to resolve and fix the brokenness in Korea's history to make a better society today by fixing the past. During her first mission, she stumbles into a mysterious guy named Ki Seok, who desperately seeks help to be away from the palace guards. Thinking that he is a mere thief, she helps him to stop drawing attention to herself, but however, gets stuck in time after trying to help him escape. Throughout her moments with him, she develops strange but warm feelings toward him, but also has an urge to run away from him. Is Ki Seok really who he says he is? Or is he someone much more different than to who she imagined? Switching between times and characters, 'Our Fate Written In The Sky' is sure to give you a bumpy ride!