Hoping to increase its box-office allure by adopting the title of a popular song, Deep in the Heart of Texas (clap!clap!clap!clap!) was the first Johnny Mack Brown western of the 1942-43 season.
Pavel Hora offers his friend Jiří Pulpán a place to live. When they get home, they find out that the landlord has evicted Pavel to the yard because he found a love letter from his daughter Zuzanka.
A police reporter solves a murder case in Chicago, then moves on to St. Louis-but not voluntarily, since he has been kidnapped by the minions of the Windy City gang leader against whom he is scheduled to testify.
Carmelita and Uncle Matt find themselves in a haunted house, but the "ghosts" are actually enemy agents who are trying to frighten away visitors in order to develop a nitroglycerin bomb.