It's 1134. In a bleak monastery somewhere in Germany, Paul of Ardiun begins the chronicle he has been ordered by his religious superiors to write: the story of the knight Karelian Brandeis, for whom Paul once served as squire, who fell prey to the evil wiles of a seductive sorceress, thereby precipitating civil war and the downfall of a king.

But before Paul can set down more than a sentence or two of this cautionary tale, the sorceress herself magically appears to him. He is a liar, she tells him, and always has been. She lays a spell on him: from this moment, he will only be able to write the truth.

But what is the truth? All his life he has rearranged his memories to suit his faith. He has judged Karelian, judged the women, judged the world.

Now, against his will, an entirely different story begins to emerge.