When young Robert Shannon is orphaned he leaves his home in Ireland and travels to Langford, Scotland, home of his maternal grandparents. Growing up in the home of his penny-pinching grandfather is made bearable by his doting but irresponsible great-grandfather, loving grandmother and kind aunt and uncle. As he matures into a young man Robbie's dreams turn to medicine and becoming a doctor. Supported by everyone in the family except his grandfather, he studies for a scholarship as a way to escape life toiling in the local boiler-works. 

Charles Coburn, Tom Drake, Beverley Tyler, Hume Cronyn and Dean Stockwell, all reprise their original 1946 film roles.