Top actress Han Se Kye is known to be a troublemaker and object to many rumours. While her life is for many a mystery, she actually suffers an unusual phenomenon in which her appearance changes to a complete different person once every month. One day she bumps into Seo Do Jae, an executive of an airline. Even though Seo Do Jae is unable to recognize faces, he tries his best to hide his issue and to memorize people by their habits and mannerisms.