Naked Hearts.

Maud and Cecil have been in love since they were children in the pre-Civil War South, but Howard, Maud's domineering brother, disapproves of a marriage between them. Instead, he has chosen English nobleman Lord Lovelace as the ideal fiancé for Maud. On the night that the engagement is to be announced, however, she elopes with Cecil. The runaways are caught, though, after which, because of her loyalty to her brother, Maud sends Cecil away. When the Civil War begins, Howard, Lovelace and Cecil all volunteer, and are all soon reported killed in action. Heartbroken, Maud decides to become a nun, and takes her vows just moments before Cecil, whose death was mistakenly reported, returns from the battlefield and comes to the convent to ask her to marry him.