Hardie investigates a stagecoach holdup where white men posing as Indians kill the driver and guard and left a pretty passenger for dead. Billy the Kid rescues the stranded lady who convinces Hardie Billy didn't rob the stage.

Hardie attempts to find a gang of outlaws who specialize in stealing buffalo hides from a buffalo hide buyer, Fresno Keeley, backed by Wells Fargo. He suspects one of those involved is Billy Thompson, brother of Ben Thompson.

During an attempted hold-up, Hardie guns down a man who the outlaw leader claims was not a member of their gang. Hardie learns the man was an ex-convict who had gone straight after being released from prison and investigates him.

Hardie teams up with railroad investigator, Mike Forbes, to solve a robbery of their joint office in Amity, Kansas. As they solve the robbery a second robbery occurs involving a murder and a stabbing causing issues with some Texas cowboys.

Jim pursues Luke Frazer for murder right after he guns Bud Scanlon down. Hardie apprehends the gunslinger who's worried his impressionable brother Johnny is following in his footsteps. Hardie decides to help prevent that from happening.