Marina di Malombra (Borelli) lives in a castle prior to her wedding. She begins to read letters written by an ancestor called Cecilia. She finds out that Cecilia was driven to her death by her uncle. Marina identifies with Cecilia and take revenge on her behalf by murdering her uncle.

Thea is a sculptor who is diagnosed with tuberculosis before she marries Filippo. After abandoning him, her health begins to decline. She organizes a final party, inviting along her estranged husband. The film is considered to be lost, with only a fragment surviving in the film archive of the Cineteca Italiana.