In the film, "We Have Always Lived in the Castle," Merricat (Taissa Farmiga) lives with her sister Constance and her Uncle Julian (Crispin Glover). The trio are survivors of an arsenic poisoning that killed everyone else in the family five years prior. Despite being hated by the townspeople, the sisters live an idyllic life, until cousin Charles arrives. Charles offers to help around the house, and inquires about the family's finances. Constance is charmed by Charles, and Merricat resents Charles' intrusion. As Charles and Merricat battle for control, tragedy threatens to strike again.