The titular family is the most prosperous and powerful in town at the turn of the century. Young George Amberson Minafer, the patriarch's grandson, is spoiled terribly by his mother Isabel. Growing up arrogant, sure of his own worth and position, and totally oblivious to the lives of others, George falls in love with Lucy Morgan, a young though sensible debutante. But there is a long history between George's mother and Lucy's father, of which George is unaware. As the town grows into a city, industry thrives, the Ambersons' prestige and wealth wanes, and the Morgans, thanks to Lucy's prescient father, grow prosperous. When George sabotages his widowed mother's growing affections for Lucy's father, life as he knows it comes to an end.