Chinese sleuth Charlie Chan discovers a scheme for the theft of government radar plans while investigating several murders.

After living all his childhood in the street, a young boy rapidly notices that crime doesn't pay, leading him to become a policeman. One day, one of his best friends goes to prison for a murder he didn't commit. The policeman tries his best to release the friend by proving his innocence.

When Sheriff Jake sees a man at the safe and then finds the payroll gone, he trails him. Just as he is about to arrest him, the man saves his life. Still suspicious, he joins up with the man and later they learn that Melgrove, the towns leading citizen, is trying to take over the area's ranches by having his gang stop all incoming supply wagons. With the ranchers about to sell to Melgrove, the two newcomers say they will bring in provisions.

U.S. Marshals Nevada Jack McKenzie and Sandy Hopkins are working undercover to capture a gang stealing horses from the Navajos, and to capture the killer of a Ranger. Nevada poses as an outlaw to get in with the gang and find the leader, while Sandy pretends to be a drunken old horse thief that has knowledge of where the Navajos have hidden their ponies.

In the 18th entry of Monogram's 24 "Range Buster" films, the bank of Gila Springs is robbed by Ace Alton and his gang, and Sheriff Frank Hammond, son of Marshal Jim Hammond, is killed. The Marshal sends for the Range Busters, Dusty King, Davy Sharpe and Alibi Terhune, to come and restore order to the town. Ed Cole, head of the local vigilantes, and secretly the head of the outlaws, promptly orders the trio out of town. They visit an old friend, Rancher Mike Rand and his daughter Mary. Mary's brother Jeff has unwittingly become a gang member, and carries out Cole's orders by taking a shot at Davy, but the latter makes him a prisoner during a subsequent fight in the town café. Jeff confesses to Cole's involvement, and the Range Busters, with the help of town banker Harrison, set a trap for Cole and his outlaw vigilantes.

Whip Wilson and Andy Clyde are back and Monogram's got 'em in Fence Riders. The Whipster comes to the aid of beautiful ranch owner Reno Browne, who is being victimized by rustlers Myron Healey and Riley Hill. To get Wilson out of the way, the villains frame him on a murder rap.

A seemingly charitable soup kitchen operator (who moonlights as a criminology professor) uses his Bowery mission as a front for his criminal gang. Police attempt to close in on the gang as they commit a series of robberies, murders and bizarre experiments on corpses.

In one of his better Monogram Westerns, Johnny Mack Brown goes up against a crooked saloon owner with more than one murder on his conscience. Steve Corbin (Tristram Coffin) and his gang of cutthroats are terrorizing the townspeople of Rimrock, who in self-defense hire Johnny Macklin (Mack Brown) as new town marshal.

Detective James Lee Wong must find the "Eye of the Daughter of the Moon," a priceless but cursed sapphire stolen in China and smuggled to America. His search takes him into the heart of Chinatown and to the dreaded "House of Hate" to find the deadly gem before it can kill again.

A reporter and a detective team up to solve the murder of a nightclub singer who had been involved in a divorce scandal.

In ridding the area of muggers, the East Side Boys acquire a wealthy benefactor whose privileged son, unbeknownst to him, has fallen in with thugs.

A mother and daughter set out on a weekend river rafting retreat, only to encounter 3 escaped convicts along the way.

A man is brought back from death at the same time a vicious criminal dies in the electric chair. However, the man's soul is now taken over by the electrocuted gangster, who embarks on a vengeful crime wave.

To draw attention to a popular show, a publicity expert hires a former carnival character, not knowing that the man is on the run from the law.

Maxwell Archer, a private detective, attempts to clear a young man wrongly accused of murder.

The East Side Kids try to fix up a house for newlyweds, but find the place next door "haunted" by mysterious men.

A spunky young bellhop investigates the murder of a hotel guest.

A detective investigating kidnapping case discovers the victim, who may be a zombie.

U.S. Marshals "Nevada Jack" McKenzie and "Sandy" Hopkins, working undercover, investigate a plot to rob a widow and her daughter of a mine which they know to be filled with gold-laden ore, but the widow believes it has played out. A hermit, hanging around the mine and killing, impartially, anyone who enters the mine, impedes the investigation somewhat.

A man known to be a mute is suspected of committing a murder, as he was noticed at the scene. However, witnesses saw and heard him talking as he was leaving the scene of the crime. The police must determine if he is the actual killer or if he is being framed.