One dark and stormy night, an escaped convict, an embezzler, a runaway daughter, her intended and her father, and a gangster take refuge in a remote inn called "The Black Raven" after the nickname of a second gangster who owns it; and murder ensues.
The Falcon is framed for the murder of a banker and the theft of war bonds. He makes his escape into the mountains where he hides out in a rustic lodge. From here he uncovers a phony war bond operation.
A dark night in war time, with several black-outs, it's just a night for murder. Susan Cooper, a fast-talking girl reporter, doubles as amateur sleuth solving yet another mystery among Hollywood's famous.
In the midst of World War II, Sherlock Holmes rescues the Swiss inventor of a new bomb-sight from the Gestapo and brings him to England, where he quickly falls into the clutches of the evil Professor Moriarty.
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.
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.
When crime boss Big Mike Morgan is killed, his lieutenant, "Doc" Rogers, learns that Morgan has a son named Edward living in the country with his mother. Rogers has naïve Edward brought to the city and installs him as the head of Acme Protective Agency. Good-hearted Eddy assumes his company provides insurance, rather than extortion-- But don't be too hard on the guy, he still doesn't know he's Baby Face Morgan, the most feared gangster in the city!
An actress gets involved with a criminal gang and winds up taking the rap for a $40,000 robbery. Before being sent to prison, she steals the money from her partners and hides it, thinking to use it as a bargaining chip to be released from prison. However, her former partners have different ideas.
A New York radio personality travels to the small town of Fernville to oversee a contest to identify retired safecracker Jimmy Valentine, believed to be living there under an assumed name. The close-knit town of upstanding citizens is understandably upset by this venture, all the moreso when some of its citizens begin to be murdered. The radio personality and the local newspaper's young daughter collaborate on solving the murders while revealing Valentine, who has become one of the suspects.
The police arrest a man climbing over the wall of a cemetery after midnight. He claims that he is being blackmailed and is following instructions he received by mail to leave $1000 on a certain grave. It turns out that he's not the only one who got a blackmail letter from the same person--calling himself "The Black Panther"--and it also turns out that all the recipients are connected to an opera company.
The East Side Kids discover that one of their own, Danny, is torn between staying in school and becoming a boxer, and is getting mixed up with gangsters.
When two showgirls decide to leave South America and head for home, they sweet talk the purser of a clipper ship into giving them berths. In the course of the voyage, a band of thieves attempts to take over the ship and make off with its cash cargo. The heroic purser has other ideas and weighs in to save the day.
The relatives of a rich old woman unsuccessfully try to have her declared insane, so they can divide up her money. To show them that there are no hard feelings, she invites them to her estate for the weekend so she can decide to whom she actually will leave her money when she dies. Soon, however, family members begin turning up dead.
Circumstances force naive Rita Adams into serving an unjust prison term, but she emerges from it a cynical criminal who rises to power in the local crime organization.