On her eighteenth birthday, Constance learns a secret - she once had six brothers, whom her father cursed one day and turned them into six white swans. Constance is the only one who can break the curse if she remains silent for six years. She doesn't hesitate for a moment and sets off into the forest to fulfill her mission and free her brothers from the curse. In the forest, she is met by a prince who falls in love with the mysterious, silent beauty...