Phileas Fogg is a wealthy, solitary Londoner of perfect regularity, a member of the Reform Club who breakfasts and dines at fixed hours, plays whist for the contest rather than the money, and reveals almost nothing of himself. On the same day he engages a lively French servant, Jean Passepartout, who has drifted through many trades and hopes at last for a quiet life with the most exact gentleman in England.
That evening, an argument at the club about a daring bank robbery turns to whether the world can be circled quickly, and Fogg declares it can be done in eighty days. Challenged, he wagers twenty thousand pounds, half his fortune, against five fellow members, and sets out that very night with Passepartout and a published timetable that strings together trains and steamships across Europe, Asia, the Pacific, and America.
From Suez onward the pair are shadowed by Detective Fix, who has decided that the reserved, well-funded traveller is the missing bank thief and who works to delay him until a warrant can arrive. Crossing India, the railway proves unfinished, so Fogg buys an elephant; on that detour the travellers rescue a young widow, Aouda, about to be burned alive on her husband's funeral pyre, and she joins the journey rather than be recaptured.
The route runs on through Hong Kong, where Fix waylays Passepartout, and across the Pacific to America, where a Sioux attack and other accidents repeatedly cost time that Fogg recovers by improvisation. Reaching the Atlantic short of a steamer, he buys his way aboard a vessel, takes command, and finally burns its upper works for fuel. Landing in England, he is briefly arrested by Fix, the error discovered too late to seem to matter.
Believing he has lost by mere minutes, Fogg learns from Passepartout that the date is a day earlier than he thought: by travelling steadily eastward toward the sun, he gained a day without knowing it. He reaches the Reform Club within seconds of the deadline and wins. The expenses have nearly eaten the prize, but the journey has given him Aouda, whom he marries, and the happiness he had never gone looking for.