York: July 1224

On a hot July night, Brother Clement is savagely murdered when returning from administering to Lady Maud de Mowbray.

Simon de Hale, Sheriff of Yorkshire, is in his office when Abbot Robert visits to inform him of the murder, and request that he take responsibility for investigating the killing.

Simon is unsure whether the murder is a crime against the Abbey, or if it is a more personal matter against the monk.

Commencing their investigation, Simon and his deputy, Adam, ride out to see Lady Maud de Mowbray at Overton – the last person to see Brother Clement alive. When they encounter her son, Roger de Mowbray, they both take an instant dislike to him.