In the middle of the 19th century, after bloody war with Mexico, Americans have begun conquest of the huge territory of Texas. At the new owner of a hacienda of Kasa-del-Korvo of business go far not brilliantly. Besides there is a terrible event: completely his son disappears. Suspicion of murder falls on the young mustanger Maurice Gerald with whom the owner's daughter is in love. When it seems that the execution is inevitable, the main witness of crime suddenly appears.