After a jeweler hires a private detective to help him find $50,000 missing from his company, he is murdered while attending a society party; and the private eye, aided by his comely secretary, vies with a bumbling police detective to find the murderer among several suspects, including the dead man's daughter, her current husband, her former husband, and an ex-convict.
Thomas Dekker is a diamond cutter attempting to reclaim his right to a portion of a rubber empire in the early part of the twentieth century. Tom travels to Brazil to uncover the fate of his father and along the way meets Teresa, a local girl who offers to be his guide in the jungle. Eventually, they encounter three armed men who take them to Lobato, a bandit who knew his father. Once convinced that Tom is his friend's son, Lobato tells him a lengthy story which culminates with his meeting Tom's father, who rescued him from drowning. With the help of "flashbacks" from an obscure South American feature, Tom learns what really became of his father.
A cowboy comes to the aid of a lady rancher threatened by Mexican bandits who believe there is a treasure buried on her land.
Ken and Happy, looking for their friend Cherokee, run into an outlaw gang led by Ritter who have been terrorizing the ranchers. Ken figures that one of the prominent citizens is the real boss and sets a trap to find him.
Thieves break into a warehouse that stores guns, steal them and kill the night watchman. An undercover agent assigned to the case happens to get into a traffic accident with the sister of the man the police suspect is head of the burglary ring, and in order to work his way into the gang, he romances the boss' sister. Complications ensue when the two fall in love.
After graduating college an aspiring photographer lands his first job--with a big city newspaper.
Lawyer Rontel has made Geologist Sheffield his prisoner and by power of attorney is using his money to buy the ranches of those driven off by his hired men. But when he goes after Hayden, Tucson and Stoney arrive and things begin to change.
Buck's friend Sheriff Simpson is after the Juarez Kid. Buck knows the Kid and the Sheriff's description does not fit. Buck then meets a one time outlaw who is now the Sheriff's deputy and thinks he is posing as the Kid. When a rancher is killed by the supposed Kid, Buck has a plan utilizing the real Juarez's Kid's ranch that will trap him.
Henry Courtney, a wealthy importer is found murdered and the famous DeNormand necklace has been stolen. The false testimony of two witnesses, Rand and Hobbs, puts Jim O'Brien in the shadow of the hangman's noose. Martha Courtney, widow of the murdered man and Jim's former sweetheart is convinced he isn't guilty, and promises crooked lawyer Roger Lanning the necklace - which Jim doesn't have - if he can arrange for Jim's escape. Rand and Lanning killed Courtney, but Lanning doesn't know that Rand has the necklace.
Someone is adding beef to Rocky Brown's herds and changing the brands to make it look like he is rustling. Then he is framed for murder and jailed. Johnny Argyle who has been sent to investigate believes he is innocent and sets out to prove it and starts with hides that have been rebranded.
