 Catania, Sicilia 1864. A serious epidemic of cholera is hitting the region. Maria a 16 years old novice leaves her convent and returns her home to avoid contamination. Here she finds a difficult situation, in fact her stepmother and her half-sisters prevent Maria to live the normal life of a teenager. In their minds Maria is the promised "bride of God" and a regular life for her is inappropriate. Nino, her handsome neighbor, falls in love for Maria who isn t indifferent to him. But when Maria comes back to her convent the way to become nun is compelled. Now Maria can understand Sister Agata, and realizes she became mad cause a lost and impossible love like the one between Maria and Nino.