The plot centers on Nina Leeds, the daughter of a classics professor at a college in New England, who is devastated when her adored fiancé is killed in World War I, before they have a chance to consummate their passion. Ignoring the unconditional love of the novelist Charles Marsden, Nina embarks on a series of sordid affairs before determining to marry an amiable fool, Sam Evans. While Nina is pregnant with Sam's child, she learns a horrifying secret known only to Sam's mother: insanity runs i