When a plane carrying the daughter of a millionaire crashes in an African jungle, two pilots set out to collect the reward. They discover that she has become the goddess of a primitive tribe. An insurgent witch doctor and fierce wild animals make escape from the jungle difficult for the trio.

Despite his talent as a musician, a city boy decides to become a boxer. He's successful as a fighter — much to the dismay of his parents. When gangsters try to by a piece of him, he begins to have second thoughts.

Racehorse-owner Dan Morgan is ruled off the track and out of racing when his horse is doped by a rival owner who knows that Dan's horse can win a high-stakes race. Trying to clear his name, Dan runs into many difficulties and incidents, including a blazing barn filled with valuable horses, before he is able to gather the needed evidence against the guilty man.

An elderly schoolteacher is determined to rid her town of the local gambling den.

Riley and Donovan, racehorse owners and trainers who have been rivals and enemies for years, seek to befriend Tod Taylor, a jockey, and Ham, a retainer. Tod elects to work for Riley, incurring the enmity of rival jockeys. Riley's daughter, Colleen, sympathizes with Tod and cares for his bruises. Trying to befriend Donovan, Tod wins a match between Riley's colt, Reckless, and Donovan's best horse; and many more victories bolster his confidence. His head is turned by Margie, a come-on girl for Drake, a gambler. She precipitates his dissipation, and Tod is induced to throw the race to avoid a jail sentence.

John Meadham, in charge of a West Africa trading post, wire the home office in London that he is tired and worn out, and they need to send a replacement to take over. The company sends a stiff upper-lipper, Charles Summers, accompanied by his wife, Margaret. An antagonism develops between the two men from the moment Summers arrives.