Wanted for a murder he didn't commit, Lightnin' Jack travels to Arizona where he gets a job on the Manning ranch. Two men are out to get the Manning ranch and see their chance when Manning decides to use Lightnin's horse in the big race. They get Manning to bet his ranch and then kidnap Lightnin' so he won't be there to ride.

"A Thunderbolt Never Strikes Twice in the Same Place"