Lady Margaret is the sole heir to the immense fortune of a noble. On the death of her father, having not yet reached the age of majority, she goes to live with his brother and her family, whom she has never known. Her uncle, Sir Arthur, lives in an old mansion in voluntary isolation, following gossip and accusations brought against him due to a mysterious suicide that took place within the walls of his castle. When Margaret arrives at Carrickleigh's mansion, the warm welcome from her cousin Emily to her and the seemingly affectionate one from her uncle comfort her about her, making her feel welcome. The only one who makes her uncomfortable with her is her cousin Edward, for whom she feels contempt from the beginning: in fact the man, in league with her father, wants to force her into a marriage that bring her inheritance into possession of her. The girl does not intend to comply with their wishes, but this rebellion of her will prove dangerous ...