To be sole heir of an inheritance, a rancher kills his cousin, the only other next of kin. When he tries to say he was on a late night ride at the time of the murder, it's up to Annie to find the holes in his alibi.
When he is unable to save his own father, Diablo's town doctor loses his confidence in himself. It's up to Annie to convince him that Diablo needs him and that you must get right back up when you're knocked down.
Clell Morgan is a former delinquent who is starting over with the help of the Junior Pioneer Club of Diablo. He begins to worry that all that may fall apart when he learns his older brother has escaped from jail and is headed to Diablo.
Link and Evie Tabor have been struggling, working their ranch, ever since Link was injured in a rodeo mishap and confined to a wheel chair. But if that wasn't hard enough, now the Tabors are being threatened by outlaws.
The newly arrived Peters family seem to be angry at the world and want nothing but to be left alone. But Annie, Tagg and Lofty try their best to be friendly, and to find out what's underneath all that hostility.
Unexpected trouble comes to a rancher who hires ex-convict Steve Bailey. The real trouble starts when Steve's outlaw brother Duke Bailey comes to the ranch determined to keep his brother from going straight.
Lofty captures a member of an outlaw gang who happens to be the only one who knows where the loot of a recent hold-up is buried. In an effort to free the crook, his confederates attempt to bribe Judge Bowen, who is about to resign his post to care for his wife who needs expensive medical treatment.
When a section of the territory is opened for settlement, Ralph and Mary plan to race in the land rush and claim a fertile piece of land Mary's father discovered in his travels years before. When Ralph is brutally beaten by a pair of crooks who are aware of the land's value and plan to claim it for themselves, Annie and Lofty decide to enter the race and stake a claim for the young couple.