Agnes, a marquise's daughter, learns that her long-standing love, the crown-prince Lucilleur, has ended their engagement in favor of another woman. Feeling abandoned and oppressed, she decides to break free from the unrequited love that consumed her. As Agnes fiercely defends her home, freedom, and dignity, her obsession with Lucilleur deepens. Their love story, marked by stubbornness and unspoken truths, unfolds on a tumultuous path towards an uncertain destiny.