Ralph Delchard, a soldier who fought at the Battle of Hastings, and Gervase Bret, a talented lawyer, have been commissioned by William the Conqueror to look into irregularities brought to light during the compilation of the Domesday Book. A man’s body is found mutilated in Savernake Forest and the residents of Bedwyn sleep uneasy at night, fearing a monster stalking the town. When Ralph Delchard and Gervase Bret arrive, they discover that the locals are harbouring dark secrets and that the real killer may be a little closer to home....

The frontier zone of Archenfield in Herefordshire is a no-man's-land, which acts as a bulwark between Norman-controlled English soil and the Welsh border. Soldier Ralph Delchard and lawyer Gervase Bret arrive in Hereford for what looks like one of their more straightforward assignments from the crown, to settle conflicting claims to land in Archenfield. Ralph and Gervase are shocked to discover the murder of a principal witness, a wealthy landowner who was burned alive in his own home. No clues remain except an enigmatic red dragon cut into the turf in front of the house.

Soldier Ralph Delchard and lawyer Gervase Bret lead a group of the king's finest commissioners into the war-torn lands of Yorkshire to settle land claims and compile the Domesday Book. One island of wealth and luxury remains in Yorkshire: the castle of merchant Aubrey Maminot. There the commissioners learn of two great terrors: the rogue Olaf Evil Child, a hero of the poor and conquered Saxon people, and the ravenous lions Aubrey Maminot keeps as pets. 

Three powerful Norman lords and a Saxon thegn watch their horses competing in a race near Woodstock. When one of the riders is murdered during the race, suspicion falls on the Saxon. Ralph Delchard and Gervase Bret are guests at Oxford Castle while they deliberate on land disputes in the area. Caught up in the murder investigation, they feel that a man has been wrongly accused and, in trying to save him from execution, get themselves immersed in a sea of malice, treachery, lust and simmering hostility.

January, 1381. As guests of the Regent, John of Gaunt, Brother Athelstan and Sir John Cranston are attending a mystery play performed by the Straw Men, Gaunt’s personal acting troupe, at St John’s Chapel in the Tower of London when the evening is rudely interrupted by sudden, violent death. Who would have the audacity to murder two of Gaunt’s VIP guests and the wherewithal to strategically position two severed heads on the stage without being noticed? The regent orders Athelstan to find out.