Kang Da Jung is a capable, hard-working manager for a luxury hotel whose traumatic childhood makes her shy away from serious relationships.  When a handsome stranger takes an interest in her, she considers giving him a chance.  But a tragic event leaves her with more questions and trauma.  In search of healing and friendship, she meets a psychiatrist who has an office in the building where she lives, but he carries wounds of his own.  As the two of them search for answers to a mysterious crime, they find an emotional connection that may help them both make peace with their pasts.