It's 1325, and in England turmoil is rife. But could the Prophecy of St Thomas's Holy Oil be the key to saving the ill-fated reign of King Edward II? It is believed the one anointed with it will be a lion among men: he will conquer France, unite Christendom and throw the heathens from the Holy Land.
Meanwhile, Sir Baldwin de Furnshill, Keeper of the King's Peace, and his friend Simon Puttock return from France with urgent messages for the King himself. Soon they find themselves at the centre of a deadly court intrigue involving the most powerful and ruthless men in the country, who will stop at nothing, not least murder, to achieve their ambitions...
