Sylvia, the youngest daughter of a duke's family, has been having mysterious dreams since she was a child. In her dreams, she is called 'Sir' and lives in a turbulent era. By her side is a vice captain whom she thoroughly trained. Sylvia feels that these dreams are more like memories. When she meets the crown prince, she instantly realizes that her dreams were from her past life. The crown prince then declares, 'Now is the time for me to get back at you' and makes Sylvia his fiancée... This is basically a romantic comedy with occasional serious moments.