A man's loud-mouthed bumbling almost ruins his new wife's family.

Amy Fisher is anxious about a blind date arranged by her friend Hortense's fiancé, Horace Adems. Horace has fixed Amy up with his colleague, Aubrey Piper, a pipe dreamer who spins tall tales about his mundane life. At dinner, Aubrey, who is really a lowly clerk at a freight office, brags to Amy that he is the manager of his department and tries to impress her with stories about his extensive travels, although he has never been out of Philadelphia. At the end of the evening, Aubrey borrows money from Horace and then pretends to pay the entire bill himself. Smitten by the smooth-talking Aubrey, Amy invites him to dinner at her parents' house, and there he meets Mr. and Mrs. Fisher, her brother Joe, an amateur inventor, and her sister Clara Harlin and her husband Frank, a successful businessman. After boasting about his accomplishments the entire evening, Aubrey tries to demonstrate his vast knowledge of chemistry and sets Joe's lab on fire, causing Mrs. Fisher to dub Aubrey the "big wind." When Mrs. Fisher discovers that Aubrey is only a clerk, her suspicions about his being a phony are confirmed. Pop Fisher is so repulsed by the loquacious Aubrey that he turns off his hearing aid whenever Aubrey enters the house. Although Amy knows that her family finds Aubrey repugnant, she recognizes his devotion to her and marries him anyway. Aubrey's reckless expenditures throw the newlyweds into debt, and when he buys a large dog to protect his wife, his landlord evicts the couple and their canine. As Horace guaranteed Aubrey's purchase of Amy's engagement ring, the jeweler threatens repossession when Aubrey fails to make his payments. To raise money, Aubrey appears on a radio show contest but loses all his winnings when he insults the show's sponsor. Soon after, Joe makes the mistake of telling Aubrey that he has been offered $30,000 by the Appleton paint company for his rust prevention formula. On Saturday, Horace picks Aubrey up in his new car to drive him to the jeweler to make restitution. Along the way, Aubrey, who has no driver's license, insists on taking the wheel and promptly causes a multi-car accident in which a policeman is injured. Aubrey is arrested for reckless driving, and Frank posts his bail. After their landlord moves their belongings into the street, Aubrey, Amy and their dog move in with the Fishers. Throughout Aubrey's tribulations, Amy never loses faith in her husband, however. Thinking that he is helping Joe, Aubrey visits Appleton and, representing himself as Joe's business manager, demands $100,000 for the formula, causing a furious Appleton to cancel the deal. Later, when he is brought to trial for his car accident, Aubrey insults the judge and pontificates on traffic conditions, prompting the judge to fine him $1,000. Mrs. Fisher is disgusted by Aubrey's antics, but Clara defends Aubrey and Amy's love and confides that she has a loveless marriage. Aubrey's troubles continue to mount when Horace presents him a bill for his car repair. Upon learning that Frank has paid Aubrey's fine, Mrs. Fisher, unable to contain herself any longer, tells Aubrey off. Humbled, Aubrey is about to admit that he bungled Joe's business deal when Appleton comes to the house and offers Joe $75,000 plus 25% of the profits. Declaring that Aubrey provided him with the inspiration for the formula, Joe insists that he accept a sixth of his share, and all ends happily when Amy announces she is pregnant.