Three children track their lost piano with one note missing through London.

Diplomats, soldiers and other representatives of a dozen nations fend off the siege of the International Compound in Peking during the 1900 Boxer Rebellion. The disparate interests unite for survival despite competing factions, overwhelming odds, delayed relief and tacit support of the Boxers by the Empress of China and her generals.

A dog with a spying device under its skin is sent to the Russian government as a present. When the Russians send the dog to a veterinary, British intelligence must get to the dog first and retrieve the spying device.

The film begins in a WW II training depot of a British Guards armoured regiment where recruits from many walks of life learn to survive the strict discipline and training together before going into battle in tanks. There is a cameo appearance by the real Sgt. Major Brittain who was famous in the British guards regiments.

Major Charles Carrington (David Niven) is arrested for taking £125 from the base safe. He also faces two other charges that could finish his distinguished service career. He decides to act in his own defence at his court martial hearing, his argument being that he is owed a lot of money from the army for his various postings that have cost him out of his own pocket. To further complicate the proceedings, Carrington alleges he told his superior, the very disliked Colonel Henniker, that he was taking the money from the safe. A man's career, his marriage, and quite a few reputations all hang in the balance.

When a robbery at a racetrack goes wrong ex-con Johnny Bannion is caught and sent back to prison. He won't tell the rest of the gang where he has stashed the loot leading to violent consequences.