Disney musical about Mother Carey, a Bostonian widow and her three children who move to Maine. Postmaster Osh Popham helps them move into a run-down old house and fixes it up for them. It's not entirely uninhabited, though; the owner, a Mr. Hamilton, is a mysterious character away in Europe, but Osh assures them he won't mind their living there, since he won't be coming home for a long time yet. The children and a cousin who comes to live with them have various adventures before an unexpected visitor shows up
A young daughter of poor farmers is forced by her mother to ditch her young boyfriend in order to marry an old rich neighbor but the girl rebels by becoming the town's harlot.
A Union Cavalry outfit is sent behind confederate lines in strength to destroy a rail supply center. Along with them is sent a doctor who causes instant antipathy between him and the commander. The secret plan for the mission is overheard by a southern belle who must be taken along to assure her silence.
