King Henry V - the great Lion of England - is long dead. In 1437, after years of regency, the pious and gentle Henry VI, the Lamb, comes of age and accedes to the English throne. His poor health and frailty of mind render him a weakling king. Yet there are those who believe England must be led by a strong king if she is to survive. With England's territories in France under threat, and rumours of revolt at home, fears grow that Henry and his advisers will see the country slide into ruin.