When Sir John Falstaff decides that he wants to have a little fun he writes two letters to a pair of Window wives: Mistress Ford and Mistress Page. When they put their heads together and compare missives, they plan a practical joke or two to teach the knight a lesson. But Mistress Ford's husband is a very jealous man and is pumping Falstaff for information of the affair. Meanwhile the Pages' daughter Anne is beseiged by suitors.

Henry Bolingbroke has now been crowned King of England, but faces a rebellion headed by the embittered Earl of Northumberland and his son (nicknamed 'Hotspur'). Henry's son Hal, the Prince of Wales, has thrown over life at court in favour of heavy drinking and petty theft in the company of a debauched elderly knight, Sir John Falstaff. Hal must extricate himself from some legal problems, regain his father's good opinions and help suppress the uprising.

With his crown under threat from enemies both foreign and domestic, Henry IV prepares for war. Having deposed the previous king, he is only too aware how tenuous his position is, and the price to be paid if he falters.