An aging lawman in the turn-of-the century West finds himself out of step with the times and reluctantly accepts a job as a deputy to an inexperienced college-educated Police Chief in Oklahoma. He uses his brain and primitive beginnings of early-day criminal science to solve crimes.

Hec sets out to clear innocent Indians and catch the real killers of three ranchers. Color blindness is a strange key to solving the mystery.

Hec acts as lawyer to a former girlfriend. Savannah is accused of killing the son of the richest man in New Mexico, a powerful man who controls both the Sheriff and Judge.

Hec hunts the killers of his fiancee, Norma Muldoon and her son Andy during a stagecoach robbery. His chief suspect is the son of an old friend and fellow lawman.