Wealthy rancher Don Fernando de Vega sends for his grandson Carlos Hernandez, fearing for his ranch's future after his death. After Carlos is waylaid and wounded, the Cisco Kid, who looks identical to Carlos, assumes his identity and inherits the ranch. However, the rancher's nephew Ricardo plots to take the ranch for himself, and the Cisco Kid must outsmart him and save the ranch for Don Fernando's intended heir.
Romance of the Rio Grande
Undercover as a rancher's grandson, the Cisco Kid uncovers a plot to seize control of the ranch.