Inside Detroit plot
"IT'S DYNAMITE!"
There is a bomb attack on the headquarters of the United Auto Workers union. The brother of the devoted labor leader Blair Vickers is killed in the process. The man behind the bombing is the criminal Gus Linden, who has just served a sentence for fraud with working time statements. Linden wants to take control of the union. Linden's children do not believe their father is capable of this crime and they accuse Vickers of libel. Vickers, with the help of Linden's former mistress Joni Calvin, launches a counteroffensive in hopes of making Linden's children realize that their father is unfaithful to their mother and a corrupt, murderous mobster.