Yeon is a competent, popular medical officer at East Seven Center, a defense facility located on the outskirts of the city with a big secret. When Woo Taeha, the youngest Lieutenant General in history, comes to the Center, Yeon finds him familiar although he cannot quite grasp why. Yeon begins to remember his past with Woo although Woo does not seem to remember anything. With a mystery in their hands, Yeon and Woo find themselves attracted to each other.