The said their vows before God, but not to each other. In Baltimore, Maryland, in 1868, Priscilla and Caleb's marriage of convenience seems the only solution. She'll do anything to provide for her beloved grandparents; he needs her help to rescue his failing farm. Despite her resolve to the contrary, Priscilla finds herself drawn to her new husband, a man she knows is still in love with his late wife, Laura, who has been gone for eight years. Meanwhile, Caleb struggles to control the growing love he feels for Priscilla, as well as his consuming guilt. In desperation, Caleb prays that God will give him strength to solve his dilemma: keep the precious vow made on the day he buried Laura or keep his newly spoken marriage vows with Priscilla.