Changeling

Accused of heresy and expelled from his monastery, handsome seventeen year old Luca Vero is recruited by a mysterious stranger to record the end of times across Europe. Commanded by sealed orders, Luca is sent to map the fears of Christendom and travel to the very frontier of good and evil.
Seventeen year Isolde, a Lady Abbess, is trapped in a nunnery to prevent her from claiming her rich inheritance. As the nuns in her care are driven mad by having strange visions, walking in their sleep, and showing bleeding wounds, Luca is sent to investigate, and all the evidence points to Isolde's criminal guilt.
Forced to face the greatest fears of the medievil world-dark magic, werewolves, madness- Luca and Isolde embark on a search for truth, their own destinies, and even love as they take the unknown ways to the real historical figure who defends the boundaries of Christendom and holds the secrets of the Order of Darkness.