Major Lex Kearney becomes the North's first counterespionage agent as he tries to discover who's behind the theft of Union cavalry horses in Colorado during the Civil War.Major Lex Kearney becomes the North's first counterespionage agent as he tries to discover who's behind the theft of Union cavalry horses in Colorado during the Civil War.Major Lex Kearney becomes the North's first counterespionage agent as he tries to discover who's behind the theft of Union cavalry horses in Colorado during the Civil War.