Larry Baker is a young fireman whose daring exploits have led him to receiving a lot of newspaper publicity which goes to his head. His sweetheart, Mary O'Connor, and fire-department friends begin to shun him as they think he is just a publicity hound. But a daring rescue of Mary and her younger brother, Mickey, from a blazing inferno shows him to be more than just a publicity-chaser and, now, a real hero to all.
When John Mason's father is killed, John is wounded. Attracted to his nurse Alice, a conflict arises between him and his friend Ben who plans to marry Alice. John later finds the killer of his father but goes to face him not knowing Ben has removed the bullets from his gun.
Rodeo star John Scott and his gambler friend Kansas Charlie are wrongly accused of armed robbery. They leave town as fast as they can to go looking for their own suspects in Poker City.
The son of Sheriff Clay Hartley, of the frontier town Elder, has gotten into bad company and hangs out with an outlaw gang in which, Collins, owner of the Golden Rule Saloon, is the secret head. Sheriff Hartley suspects him, but has been unable to gather the needed evidence. Collins instructs his gang, including young Hartley, to hold up the stagecoach on its return trip from Missionary Flats and take the cargo of gold dust it is carrying. Sheriff Hartley is notified of the planned holdup by one of his deputies who has been spying on Collins, and organizes a posse. A deputy-sheriff is killed in the ensuing gunfight between the lawmen and the outlaws, but Deputy Joe Larkin, pursues and captures Clay Hartley Jr. The latter is quickly tried and convicted of the killing of the deputy, and sentenced to be hung. Sheriff Hartley has only a few hours to prove his son was not the killer. He enlists the aid of Collins' step-daughter, Joan, who is in love with Hartley's son.
On the mystic island of Lemuria, the cult of Ubasti seek the Egyptian Princess Nadji to sacrifice so that their goddess Ossana, whose soul resides in Nadji's body, may be resurrected by Black Magic. Nadji is located in the Far East port of Suva, but shielded by the White Magical powers of Frank Chandler, an American raised by Eastern mystics who is also known as Chandu. When Chandu takes a voyage alone, however, the evil Voice of Ubasti is able to magically spirit her to Lemuria, where Black Magic reigns supreme. Chandu sets out in pursuit with his sister Dorothy, niece Betty and nephew Bob; but, shipwrecked on the magic island, Chandu finds his family also held prisoner for sacrifice while he is plunged into an endless maze of caverns beneath the evil temple, where both his mortal and magical strength seem rendered useless.
Chris Morrell, the guardian of half-Indian girl Nina, is helping her find her missing white father. so she can cash in on her late mother's oil lease. Outlaw Sam Black is after the girl and her father as well. Besides dealing with the Black gang, Morrell has to find another robber, Jim Moore, who switches clothes with him after he finds Chris unconscious from a fight with Sam Black. Along the way, he meets a lady who's the sister of Jim Moore, another bad hombre who's in cahoots with Jim Moore, and an old friend who takes in Nina and helps Chris locate Nina's father and fight off the various desperadoes
Tobin is after the bandit Zanti who killed his parents. He finds him just as Zanti is about to kill Dusty and kidnap Ruby. Saving the two, he goes after Zanti. He catches him but Zanti escapes the Sheriff's handcuff's and this time Tobin has to chase him into the desert.
Henry Jethrow is after the Wilson ranch. He has George Wilson unknowningly sign a note for the ranch, has him killed, and then presents the note. The Pinto Kid, investigating cattle rustlers, accidentally drops his glove at the murder scene and now has a price on his head. He has Beth Wilson turn him and use the reward money to reclaim the note. Now he has to escape jail and find the real killers.
Two military pilots are close friends, and share in a lot of hazardous missions while engaging in a series of good-natured romantic rivalries. But when one of the pilots loses a girl he really cared for, he cannot forgive his friend. Soon afterwards, they must work together on their most dangerous mission yet.
After Fred von Bergen, a German immigrant in America, is forced from his job by anti-German hysteria before the first world war, he and his friend Bob Wilson leave America and join the German air force. There, both men fall in love with ambulance driver Alida Hoffman. When America enters the war, Bob is caught between loyalty to his home country and the threat of execution for desertion and treason to Germany. It remains for his friend Fred to extricate him from the dilemma - but at what cost?
An Easterner Inherits a cattle ranch, only to discover that thousands of cattle have been stolen. He secretly signs on as a hired hand at his own ranch to discover who's stealing them.
Dyer is buying ranches and then retrieving his check by having his gang kill the owner. Bob Worth arrives just as Buck Morton is killed and gets blamed for the murder. Fleeing from the Sheriff, Bob teams up with the Mexican outlaw Golinda. Having seen Dyer pay off his men, he has a plan to trap him and Golinda is just the man he needs to make it work.
Bandits lead by Matt the Mute enter a bar and kill multiple people. Randy Bowers comes to town and is framed by Matt the Mute, who is working with the sheriff (who doesn't know Matt is really a criminal). Randy escapes with the help of the niece of the dead owner of the bar. Bowers ends up running from the sheriff, and ends up in the cave in which the bandits have their hide-out…
The Marshal sends John Weston to a rodeo to see if he can find out who is killing the rodeo riders who are about to win the prize money. Barton has organized the rodeo and plans to leave with all the prize money put up by the townspeople. When it appears that Weston will beat Barton's rider, he has his men prepare the same fate for him that befell the other riders.