After a beautiful but unsophisticated girl is seduced by a worldly piano player and gives up her out-of-wedlock baby, her guilt compels her to kidnap another child.

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.

Kenneth Seeley, member of the U. S. State Department's Foreign Service Bureau, and Marge Weldon, a morale worker with the bureau, are assigned to an area in Mongolia dominated by an outlaw warlord. The latter captures the village where they reside and when escape is clearly impossible, Seeley blows up the outlaw's headquarters, losing his own life in doing so.

The second Falcon film to feature actor/magician John Calvert sees the Falcon dealing with art thieves.

The passengers and crew of an airplane are stranded in an unfamiliar jungle. Unknown to most of the survivors is a criminal among them who caused the crash.

A framed reporter and the crooks on his trail scramble to locate a book containing the names of American war profiteers and traitors who collaborated with the Nazis during the war.

Magazine writer Ann Mason infiltrates the United Defenders, a public service organization which is actually a front for racketeers. But a case of amnesia threatens to blow her cover.

A fatally shot female gangleader recounts her sordid life of crime to a police officer just before she dies.

After losing heavyweight contender Al Costa to mob boss Florini fight promoter Knobby Walsh recruits small town boy Joe Palooka to take his place. First in the series.