On the nights of the full moon, fra Angelo Lorenzini crawls into the darkest part of his dungeon and pulls his blanket over him. He stays away from stray moonbeams, those stairways to the edge of his senses that start his skin prickling and the blood raging through his veins. He lifts his ears to better hear the howling of the moon, but is careful not to reply. Angelo bears the mark of the wolf. Since the discovery of this strange inheritance from his grandfather, he has sought the reason for the curse - why was he singled out? His search leads him on a long and tortuous spiritual pilgrimage....