All the passengers on an airplane headed for San Francisco are drugged, and when they wake up, it is discovered that a quarter-million dollars is missing. Charlie Chan--and, of course, his #1 son--must discover the identity of the person who doped the passengers and stole the money.

Jimmy and Cannonball escort Anne Lamont, the new school teacher, to Oreville, where she is molested by two outlaws. Marshal Blackjack Flint wounds Slade, who tells Derringer that lawman Flint is wanted by the law and, unknown to Anne, is also her father. Derringer than kills Slade and begins to blackmail Flint. Jimmy and Cannonball join the fray on the side of Flint, the reformed outlaw.

Curly Blake, nephew and heir of wealthy Red Rock rancher Jed Gordon, persuades his uncle not to invest in a crooked land scheme promoted by former judge Harmon Steele and his secretary Lem Martin.

Outlaws attempting to kidnap Steve Blaine from a stagecoach are ran off by the sharpshooting of his sister, Sally and rescuers Jimmy Wakely and Cannonball Taylor. Steve is investigating his father's sudden death after charges of theft from the Sloan/Carson mine. Sloan is killed after Wakely learns that ore is being smuggled across the Mexican border into the mine, and then sold at the higher U.S. prices

Filmed back-to-back with three other Sunset Carson vehicles in 1947, this Yucca Pictures Western starred the former Republic cowboy as a Texas Ranger chasing a gang of rustlers into the notorious outlaw territory of Three Corners. Attempting to sabotage the proposed annexation of the territory, desperado Bart Dawson (Stephen Keyes) and his men ambush Sunset and his young trainee Jed (Al Terry). The villains, who have been terrorizing pretty trading post operator Helen Bennett (Patricia Starling), are eventually defeated by the rangers in a violent gun battle and the planned annexation takes place on schedule. For all intents and purposes, the handsome but wooden Sunset Carson ended his screen career with this series of extremely low-budget Westerns, originally filmed in 16mm and released by that dumping ground of Poverty Row flotsam, Astor Pictures.

A Pony Express rider discovers some mysterious goings-on during the construction of a telegraph line. When a murder is committed, he is blamed for it.