The ruler of a Middle Eastern country is killed in a coup and his young son Prince Karim is forced to flee, hiding out with British oil-workers who were loyal to his father. The Saint arrives in the country and, with a handful of Britons, special effects and explosions, concocts a 'wonderful war' to convince the usurpers that they are now under attack.
Lord Yearley, an arrogant aristocrat whose younger wife is two-timing him, is the subject of death threats. When a shot is fired at him and he is nearly killed, his daughter asks the Saint to intervene and find the culprit.
In Buenos Aires the Saint meets an American called Beryl Carrington, whose car is bumped into by that of a charming local, Ramon, who has the damage repaired within the day. Ramon tells Beryl that he has a list of political dissidents out to topple the government in a brief-case which he wants her to smuggle out of the country. She entrusts it to the Saint but when two men attack him for it he suspects that Ramon may be using Beryl for reasons which are far from romantic.
Countess Audrey is not only a glittering socialite but a ruthless jewel thief whose chauffeur robs the homes of her wealthy associates whilst she entertains them in her Mayfair house. Her master plan is to organize a cruise for several rich couples, whom she will drug and rob whilst they are at sea. She has recruited a new gang member for this plan. Unfortunately for her he is the Saint.
Denise Dumont heads one of the most successful beauty product firms in France and is a very rich woman. However, she has achieved this by stealing the ideas of her ex-husband,Philippe whom she exploited, taking the credit for herself. He is now broken and ill. The Saint decides that, with the help of Denise's former sister-in-law, he will teach this unfeeling woman a lesson and force her, unknowingly,to contribute to Philippe's welfare.
Chief Inspector Teal is investigating a spate of burglaries which seem to be linked by the presence of a criminal known as the High Fence, who uses the Cosy Corner cafe as his rendezvous. The Saint gets an actress friend, Gaby, to take a job as a waitress at the cafe to keep surveillance on its customers. At the same time Mr. Teal is singularly unimpressed by the performance of Inspector Pryor, who has allowed a suspect to die in custody and to whom the Saint adopts a very disparaging attitude.
A man is murdered in a phone booth on Waterloo station while Simon Templar is making a call. But before his death he has managed to slip a mysterious package of "Miracle Tea" into the bag of a young nurse who works at the naval base at Portland. Now the Saint wants to know why.
In the Australian outback the Saint tricks two greedy and quarrelsome brothers into repaying their old father money that they have long owed him when he tempts them with the offer of shares in a silver mine.
The Saint is in Munich for the Oktoberfest when a friend of his, American Army Sergeant Henry Johns, is killed whilst trying to stop an armed robbery at his base. Unbeknown to him, Mathilde Baum, whom he believed to be his girl-friend, was actually part of the gang, using her friendship with him to gain insider information. Furthermore, she is now getting cosy with another American soldier, Sergeant Pargo, who was a friend of Johns. He teams up with the Saint to go after the hi-jackers and avenge their dead buddy.
Simon helps an Italian family who owns a London restaurant when a conman leaves one of their members with child. The Saint takes a particular interest when he discovers the conman left the country with a million pounds.