In the Mississippi Delta, failing, bigoted, middle-aged cotton gin owner Archie Lee Meighan (Karl Malden) has been married to pretty, empty-headed 19-year-old virgin Baby Doll Meighan (Carroll Baker) for two years. Archie impatiently waits for Baby Doll's 20th birthday just a few days away when, by prior agreement with Baby Doll's dying father, the marriage can finally be consummated. In the meantime, Baby Doll still sleeps in a crib, wearing childish shorty-nightgowns and sucking her thumb, while Archie, an alcoholic, spies on her through a hole in a wall of their decrepit antebellum mansion, Fox Tail. Baby Doll's senile Aunt Rose Comfort (Mildred Dunnock) lives in the house as well.
After Archie fails to make payments to a furniture leasing company, virtually all of the furniture in the house is repossessed and Baby Doll threatens to leave. Archie's competitor, Sicilian Silva Vacarro (Eli Wallach), who owns a newer and more modern cotton gin, has taken away all of Archie's business, and Archie retaliates by burning down Vacarro's gin that same night. Suspecting Archie as the arsonist, Vacarro plans a revenge plot and visits the farm the following day with truckloads of cotton, offering to pay Archie Lee to gin for him.
Meanwhile, Baby Doll is asked to entertain Vacarro, and the two spend the day visiting on the farm, where Vacarro explicitly inquires about Archie's whereabouts the night before and makes sexual advances toward Baby Doll. After Vacarro outright accuses Archie of burning down his gin, Baby Doll goes to confront Archie, and he slaps her in the face and leaves for town to purchase new parts for his gin.
Vacarro comforts Baby Doll, and after becoming friendly and chasing each other throughout the house, Vacarro forces her to sign an affidavit admitting to Archie's guilt. He then takes a nap in Baby Doll's crib, and is invited for supper at Baby Doll's request as a storm approaches.
Archie, drunk and jealous of Baby Doll's romantic interest in Vacarro, is short-tempered at dinner, and tells Aunt Rose she needs to move out of the house; Vacarro immediately offers to let her live with him as his cook, and he and Baby Doll flirt with one another and taunt Archie. After Vacarro confronts Archie with the affidavit, Archie retrieves his shotgun and chases Vacarro outside while Baby Doll calls the police.
The police arrive, and Archie is arrested when Vacarro presents them with the affidavit. Ecstatic at his victory, Vacarro leaves the farm, abandoning Baby Doll but saying he will be back the following day with more cotton. As Archie is taken away by the police, Baby Doll and her Aunt Rose return inside the house, awaiting Vacarro's return.[3][9]
Who is Archie's competitor?
Sicilian Silva Vacarro