Spring 1854 New York City debutante, Cassandra Morley has grown close to a trio of young brothers while volunteering at an orphanage. When the three boys are sent on the train to Missouri to be adopted, she accompanies them despite how displeased her high society family is likely to be. Single rancher, Charles Ainsworth, is glad to be in a position to provide a new home for three brothers. He has no use for the citified young woman who keeps stopping by to check on them, despite how beautiful he finds her. He feels obligated to tolerate her visits to please his new sons. Their differences cause them to fight their attraction to one another, but when one of the boys goes missing, they have to learn to trust each other in order to bring him home.