In 1845, a young woman risks her life to travel the perilous Oregon Trail to marry a man she's never met. But when she falls in love with the leader of the wagon train, she must make a decision: to go through with her contracted marriage, or to follow her heart. When Mercy Montgomery is let go from her governess position in Massachusetts, she impetuously answers the newspaper ad of widower George Crawford, a man in search of a wife and mother...