An American cavalry brigade is sent to occupy a small Filipino village in 1902 and quell guerilla resistance in the surrounding jungle. Working with the people to build roads, schools, and bridges, they prove that the most important thing an army can have is "good will and integrity."

Adventuring author Jean Williams is living in the wilds of Alaska alongside the Eskimo people gathering material for her novel. She befriends several animals who become her loyal friends such as a pair of bear cubs whose mother has been killed by hunter Gaston Rogers, a talking raven and the bereaved collie Firefly who will not leave the grave of her master, a game warden killed in the line of duty. The community is imperiled by a pack of wolves and wild dogs, led by a wild dog called Swift Lightning, who are killing all the reindeer. With the supply of fresh meat gone, the Eskimos are migrating to lands with more food. Hunter Gaston agrees to take Jean to Nenana, Alaska, along with his furs by dog sled. Jean, who despises Gaston as being more savage and blood thirsty than the four-legged predators, is followed by her loyal animals.

The Ritz Brothers go to the race track. They raise training end entrance money in a wrestling match and help a young man train the horse of his fiancée.

Stunt driver Cliff Jordan takes a job with his old pal Jerry McGee, branch manager of an express trucking firm. Jerry is married to Mary, Cliff's former girl friend. Also working for Jerry is Pete Simmons, son of the owner Al Simmons, and office secretary Jane Chandler, who is Pete's sweetheart. Before long, Cliff has made enemies of Pusher Wilks, a trucker whose run he takes over, and also Pete, whose girl he is trying to take over. Pusher sabotages Cliff's rig at every opportunity causing several near-fatal accidents.

During a test, a race car using an experimental oil fueled engine blows up, killing the driver. Lucky Taylor, a stunt driver, is initially blamed for the accident, but is later cleared. He thinks the engine design has a real chance to win races, but the racing association has banned it since the accident. He devises a scheme to have a car equipped with the engine entered into a race, without race officials-- or the engine designer's sassy daughter -- finding out about it.