Sabina has a regular life. She is satisfied with her job and her love for Franco. But nightmares start disturbing her, at almost the same time she discovers that she's pregnant. Little by little she remembers her childhood in a severe middle-class family, but a big secret is still hidden in her heart. Determined to bring clarity and serenity to her life, she considers contacting her brother, a University teacher in the U.S.A., to try to understand what happened in their past. What is the secret? Will Sabina finally manage to free herself from the "beast inside her heart"?