The owner of a large mansion in the country throws a costume party for some of his friends. However, the party turns sour when he is found stabbed to death in a closet. The police and a guest try to discover who committed the murder.
A vicious crime lord decides that he has had enough and much to the shock of his colleagues decides to give the business to his second in command and retire to Florida after marrying his moll. Unfortunately, he has no idea that she and the man are lovers.
A gangster's wife, fearful that he is about to be murdered by his rivals, tips off the police to his whereabouts in order to save his life. Her husband, however, believes her reason was that she wanted him out of the way so she could have his best friend.
A married society woman accidentally kills her would-be lover and blackmailer and then suffers a crisis of conscience when his disgruntled butler is charged with the crime.
Chick Williams, a prohibition gangster, rejoins his mob soon after being released from prison. When a policeman is murdered during a robbery, he falls under suspicion. The gangster took Joan, a policeman's daughter, to the theater, sneaked out during the intermission to commit the crime, then used her to support his alibi. The detective squad employs its most sophisticated and barbaric techniques, including planting an undercover agent in the gang, to bring him to justice.
Harold's checked cap, blown from his head by a freakish wind, gets him into trouble. First he comes into conflict with the police as a highwayman, then the cap serves to identify him as a housebreaker and lands him in jail, while the innocent cause of his trouble becomes his cellmate for another reason. Eventually a distracted wife rescues both her husband and Harold from the clutches of the law, the cap this time aiding him to regain his freedom.
