King Richard is called upon to settle a dispute between his cousin Henry Bolingbroke and Thomas Mowbray. Richard calls for a duel but then halts it just before swords clash. Both men are banished from the realm. Richard visits John of Gaunt, Bolingbroke's father, who, in the throes of death, reprimands the king. After seizing Gaunt's money and land, Richard leaves for wars against the rebels in Ireland. Bolingbroke returns to claim back his inheritance. Supported by his allies, Northumberland and the Duke of York, Bolingbroke takes Richard prisoner and lays claim to the throne.

Henry V has settled onto the throne and has the makings of a fine king when the French ambassador brings a challenge from the Dauphin. Inspired by his courtiers Exeter and York, Henry swears that he will, with all force, answer this challenge. The chorus tells of England's preparations for war and Henry's army sails for France. After Exeter's diplomacy is rebuffed by the French king, Henry lays a heavy siege and captures Harfleur. The French now take Henry's claims seriously and challenge the English army to battle at Agincourt.