Lucia grew up not knowing that she was a princess. But when her mother died, she entered the palace and saw her whole future in a dream. In that dream, when she turned 19, she was auctioned to the one who offered the highest dowry. Since then, she has had a miserable life. She woke up from a dream, determined to change such a bleak future, because she had plenty of time before the decisive turning point. She meets the cold “Black Lion of War” and enters into a marriage contract with him.