Cagliari, 1668. Francisca, Countess of Cuglieri and Marchioness of Siete Fuentes, lives a comfortable life as the wife of one of the most influential political figures of Cagliari’s high society, the Marquess of Laconi. After openly speaking against the Viceroy of the Kingdom of Sardinia and his officials, the Marquess is murdered under unclear circumstances, but the revenge of his relatives turns against the Spanish caste. The Viceroy is murdered and the game of trials begins. Francisca and her lover, Silvestro Aymerich, become the suspects of the homicides.
Cuglieri, 1830. Rosalia wants to see the ruins of the castle of Montiferru and Elias would indulge her in anything in his attempt to reveal his secret love for her, included visiting the castle allegedly haunted by the Marchioness’ ghost. Soon they realise the legend might not be completely unfounded and strange phenomena unfold around them: ghostly appearances, nightmares and, especially, attempts at their own lives.