Maria is the daughter of a duke, and from childhood, she had believed she would inherit all her father's estate and dukedom. In this pursuit, she focused all her attention on learning martial arts and fighting, never giving marriage a second thought. But as fate would have it, a younger brother was born, and Maria's dream of becoming an heir was shattered. When she decided to get married, she realized it was too late, and all the good suitors had already been booked! Poor girl goes to another country to try her luck, hoping to find a suitor there, but as soon as she gets there, a new drama unfolds. The Crown Prince of that country shouts in front of everyone that he is breaking off his engagement with Maria! Maria, surprised, replies, "Hey, what engagement?!" Later, it is revealed that the prince had mistaken her for some other girl. But when the prince sees Maria alone hunting down enemies and bandits, he is stunned. It seems the prince likes such dangerous and "ass-kicking" women!