Dans une Chine à la recherche de son unité, Tcheng s'annonce comme le chef de l'avenir. Les membres de la secte du Serpent noir tentent de l'assassiner avec l'aide de la chanteuse Kay Murphy. L'attentat échoue à cause de l'intervention d'un journaliste français qui recueille ensuite la fille de la chanteuse.
Upon reaching retirement age, Colonel Cornelius Stockton (Harry Carey) is forced to leave the US military, accepting a job running the Trans-World Air Lines School of Aeronautics in Glendale, California. "Stag" Cahill (Richard Dix), an old friend from the war, is the pilot on the commercial airliner taking him to Glendale. The colonel asks him to join the school staff, but Stag would rather fly. When the colonel arranges for Stag, a reservist, to be recalled to active duty, he orders him to take the assignment as his assistant. Stag reluctantly complies.
Jim Kimmerlee owns a salmon cannery. He is pleased to see old friend Tyler Dawson, who has been away hunting seal. Also glad to see Tyler is his sweetheart, hotel owner Nicky Duval.
Sailor Husky proposes marriage to every girl, in every port. He can't swim, and is ready to be discharged, from the Navy, but he's always helping his pal Pete. Pete would hate to see Husky leave, as Pete have to do all the work himself. Husky's new girl is Myrtle, who goes through men like Kleenex, trolling for a well-heeled catch. Pete tries to save his friend from her; but, is it only for himself? It looks like they are in for a fight.
Eleanor Reed (Eleanor Holm) accompanies her parents, Roger and Penny (George Barbier and Hedda Hopper), and Nevin Potter (George Meeker), her fiance, on an expedition to Africa to capture wild animals to sell to a zoo. Ben Alleu Bey (C. Henry Gordon) spots Eleanor and wishes her to become the one hundredth wife in his harem. When she refuses, he follows their safari.
Union Newsreel reporter Chris Hunter (Clark Gable) is sneakier and has fewer scruples than his rivals in war-torn China. When the Japanese do not oblige with a convenient aerial attack to film, Chris fakes one with a model airplane with his cameraman José Estanza (Leo Carrillo).
Alan Richards is the sole survivor of a pearling lugger which has been shipwrecked on Pakema Reef during a typhoon. He sets out to recover some pearls which went missing in the wreck, crossing through the jungle and fighting headhunters.
Shortly before the war, strange things happen at night at the School of Saint-Agil. Students begin to disappear... Three students of Saint-Agil, Beaume Sorgue and Macroy, have created a secret society to prepare leaving for America. One evening, one of them, Sorgue, sees a man through a wall in the natural sciences class. He then disappears after having been sent to the principal's office. When Macroy vanishes in turn, the whole institution is in turmoil. The last member of the secret society still at school, Beaume, might be expelled as well after the yearly school party. During this party, Lemel, the alcoholic art teacher, dies after a fall when a power outage leaves the school in the black. Everyone believes in an accident but Beaume decides to investigate. He chooses to disappear as well and, with the help of the mysterious and spooky English teacher, he manages to discover the counterfeiting business at work in the school insides.
On the eve of his wedding Captain Hugh Drummond (John Howard) has more pressing concerns when he sets off from London for Morocco after a Scotland Yard Commander is kidnapped by an international criminal intent on forcing him to reveal the secrets of the British Empire's latest military technology. With his fiancée (Heather Angel), chum 'Algy' (Reginald Denny), & valet 'Tenny' Tennyson (E.E. Clive) in tow, Bulldog outwits Scotland Yard's bureaucratic blundering, flies his own plane 1200 miles only to find more bureaucratic blundering by the local British Consul ordering him home without delay. Drummond isn't an easy man to get rid of however and soon mounts a rescue plan, liberating the Commander, saving the Empire and throwing the villain to his own captive lions in the process.
The intended wedding of Captain Hugh "Bulldog" Drummond to Phyllis Clavering at her villa in Switzerland is stopped short (once again) when someone murders the Swiss policeman who is guarding their wedding presents. The killer makes off with their prize possession, a synthetic diamond, made by a secret process by Professor Bernard Goodman, the father of their good friend Gwen Longworth. A guest, Sir Raymond Blantyre, head of the Metropolitan Diamond Syndicate, disappears at the same time, and Drummond suspects that Sir Raymond, who has the most to lose if Professor Goodman proceeds with his plans to publish his secret process, has something to do with the theft. He leaves Phyllis and chases back to England. Colonel Nielsen, of Scotland Yard, as usual scoffs at Drummond's suspicions and insists that a man as respected as Sir Raymond could not possibly be involved in such a crime. But, as usual, he has Drummond followed just in the event he turns up something unexpected. An explosion that wrecks Goodman's house, and apparently kills him, makes Drummond more positive that the diamond king has again resorted to murder to protect his business. He follows Professor Botulian, a lifelong rival of Goodman's, whom he believes to be involved in the affair. His hunt leads him to a lonely house on the outskirts of London where he finds Goodman a prisoner. Before they can escape, Drummond and Goodman are joined by Tenny (E. E. Clive), his valet, and Phyllis, who are also (as usual) being held by the crooks.
Le Colonel Loring Leigh est renvoyé de l'armée pour avoir ordonné au Capitaine Douglas Loveland de retirer ses Lanciers d'un col en Inde, ce qui a permis à une tribu hostile d'être ravitaillée en munitions et ainsi de se révolter en causant plusieurs dizaines de morts. Il télégraphie à ses quatre fils, Rodney, étudiant à Oxford, Wyatt, avocat à Londres, Chris, aviateur et playboy, Geoffrey, attaché à l'ambassade britannique à Washington, de le retrouver chez lui. Alors qu'il se prépare à leur parler de cet ordre qui a été en réalité contrefait par quelqu'un travaillant pour des marchands de munitions, il est tué par un homme qui ensuite vole ses papiers. Ses fils vont chercher à découvrir la vérité, aidé par Lynn Cherrington, la fille de l'industriel qui a produit les munitions. Ils vont découvrir le vrai coupable et rendre son honneur à leur père.
King Louis XI of France (Basil Rathbone) is in desperate straits. He is besieged in Paris by the Burgundians and suspects that there is a traitor in his court. He goes in disguise to a tavern to see who accepts a message from the enemy. While there, he is amused by the antics of poet François Villon (Ronald Colman), who has stolen food from the royal storehouse. The rascal criticizes the king and brags about how much better he would do if he were in Louis' place.
A passenger aircraft crashes in mid-Pacific and some of the survivors reach an island inhabited only by an American, Jim Taylor, with his Chinese servant, Ping. He declines to help them, telling them to build their own shelter and gather their own food and, though he has a boat and fuel, refusing to take them off. The reason why he wants to remain undisturbed, we learn, is that he is wanted for murder. In time his attitude to the intruders softens as they, despite endless bickering, manage to form a working community and he finds himself increasingly drawn to an attractive young nurse, Anne Wesson, who is running away from her husband. When the boat is prepared for a trip to civilisation, two crooked businessmen from the party steal it with Ping on board. In a fight, he kills them both and, fatally wounded, brings the boat back. The rest can then escape.