It is May 1272, and Prioress Eleanor of Tyndal journeys to Amesbury Priory to visit her aunt. A ghost now haunts Amesbury; is it the spirit of a pregnant woman who drowned herself in the River Avon? But soon the spectre turns murderous. A man is decapitated near the river where the grim figure walks. Corpses grow in number, death dances with glee and all hope of sweet spring begins to die...