In 1930s Austria, a young, free-spirited woman named Maria is struggling to succeed as a nun in the Nonnberg Abbey. Recognizing her spirited nature is at odds with monastic life, the Mother Abbess suggests Maria take a position as a governess to the seven children of a widowed naval commander, Captain von Trapp. Reluctant but obedient, Maria leaves the sanctuary of the convent to face the challenge of a new life. Upon arrival at the von Trapp estate, she finds the family regimented under the Captain’s strict rules, the children treated more like sailors than kids. The lively and warm-hearted Maria soon wins the affection of the children by introducing them to the joys of music and play, bringing laughter and happiness back into the home.

While Maria brings change to the family dynamic, Captain von Trapp, initially distant, finds himself drawn to Maria’s infectious love for life. The children, too, begin to flourish under her care, blossoming into thoughtful and exuberant young people. Their newfound unity and joy are soon threatened, however, as the political tides turn in Europe, with Austria on the brink of annexation by Nazi Germany. The Captain, staunchly opposed to the regime, must navigate the increasing pressures of the political climate, all while his fondness for Maria grows, complicating his engagement to a wealthy socialite. As Maria's bond with the family deepens, they must collectively decide how to face the impending challenges that threaten to disrupt their lives and the peace they've found with one another.