Tormond MacDonald, the last of the Templar Knights, was commissioned as Carnifex Dei, the Executioner of God, at Acre in the 13^th century. His sacred mission - family, love, even his brother Templars - to fulfill his sacred vow, and he has pursued the enemy, a trio of witches, through the centuries. But always they elude him.

Maebh O Broin, a 15^th century nun, fleeing a different, undying evil, encounters the fearsome Executioner. They are thrown together by fate - or perhaps by Providence - and together, they travel the centuries. Every time they appear, they find a wrong to right, an evil to combat. But every time, the witches escape them.

They run afoul of a demon, dealing a crippling blow to her malevolent designs. The demon plans her fiendish revenge upon Tormond and Maebh, and though it takes centuries . . . she will have them.