When the Orphan Train delivers three-year-old Kenneth Douglas Hardin to San Antonio, Texas, in 1870, Sheriff Chisholm knows that this towheaded little boy, abandoned by his mother and five siblings, is destined for greatness.
The boy becomes Kenneth Douglas of Texas and is adopted by Father Ortega, a Mexican priest who runs the Mission of the Son of San Antonio. Under Ortega's guidance and with the help of Mr. Yang, a Chinese immigrant, Kenneth learns the necessities of life and more.
At age eighteen, he's named a deputy and quickly becomes a legend, nicknamed "Boy Deputy of San Antonio" by the press. The Texas Rangers eventually recruit Kenneth to help dispel the dark cloud of violence that rumbles through the Wild West. Kenneth's primary concern, however, is the safety of his wife, Marie, and their daughter, Lilliana.
A work of historical fiction, The Guardian narrates the story of Kenneth Douglas, particularly his dedication to law enforcement and helping others even when his heart is heavy. A famous Texas Ranger, he helps free a nation as a member of Teddy Roosevelt's Rough Riders and fights for the heart of a Panamanian princess.