During the Civil War, three American soldiers are sent, disguised as civilians, to California to gather evidence that Southern agents there are agitating for that state to join the Confederacy with the aid of California's governor.

The Topeka Terror is a western film of 1945 directed by Howard Bretherton. The land-rush opening of the Cherokee Strip brings in its wake a scattering of outlaws and claim jumpers. Among these is a crooked promoter. Trent Parker (Frank Jacquet), and his henchmen who plan a huge swindle by compiling falsified reports, putting the claims of honest settlers into the names of various henchmen. Clay Stevens (Allan Lane), a government agent posing as a drifting cowhand, advises the settlers to organize their resistance. Ben Jode (Roy Barcroft), the gang leader, runs for sheriff so he can gain full control of the town.

After the Civil War, veteran Jim Christi (Allan Lane) returns to Texas, where he is unjustly accused of murder. In flashback, Mr. Christi relates the story of his father Corpus Christi Jim. After robbing a stage, Jim and partners Rocky and Steve decide to go straight and return the money. But the fourth member of the gang, Spade refuses and leaves. The two former partners soon find themselves on opposite sides of the law.

A playboy is reformed by his daughter and fiancee.

Bill Harmon receives a letter from his partner, Dave MacRoy informing him of a rich gold strike in their California mine. Arriving there, Bill learns from elderly miner John Benton that Dave is dead and that he sold the mine at a strangely low price the night before his supposed accidental death. Harmon suspects murder.

A landowner tries to drink his neighbor's molybdenum milkshake and winds up having him killed. It's up to Allan Lane to find out what happened and apprehend the culprits.

Barstow and Stevens are forcing the local printer to print fake silver certificates which they then sell. Treasury Agents Chick Weaver and Throckmorton Snodgrass arrive working under cover. But when Chick's true identity as an Agent is revealed, Barstow sends his henchmen to finish him off.

A mystery man, identifying himself as the outlaw Nevada Kid, and his comical sidekick, help the townspeople of Canyon City solve a series of murders, robberies, and threats to destroy their new power dam in the first days of electrification of the wild west.

The suspicious death of Henry King during a hunting trip with his brother John leaves the inheritance of the rich Santa Rita Ranch to be shared with John, Henry's daughter Doris and a young girl from New York, Twinkle Watts. King says that a son, Henry King Jr., who left home as a young boy was killed in a Texas gunfight. - Written by Les Adams

Bringing his large cattle herd to Sundown, rancher Tex Jordan must sell his cattle to corrupt baron Jack Hatfield. He does OK but learns Hatfield is cheating the small outfits. When one refuses to sell he is murdered and Tex then decides to stay and take up the fight. He is appointed a special Agent by the Governor but unknonw to him the Governor's Secretary is a spy for Hatfield and reveals his plans.

After bank robber Bob Hackett (Don "Red" Barry) learns that his real father was a marshal, he reforms and travels with his pal Buckshot (Wally Vernon) to Santa Fe, where his father was killed. When he stands up to rustlers working for Henry Jackson (Herbert Heyes), Hackett is made the new marshal.