As Chaucer's pilgrims shelter in the ruins of a church, the poor Priest narrates his mysterious tale.

Young Philip Trumpington, the new Scawsby parish priest, finds that the old church harbours shocking secrets. Years earlier, some Templars were massacred on the marshes, their attackers led by Romenal, a former Scawsby vicar. Philip discovers the old church is haunted by 'The Watchers' and the villagers are scarred by a terrible curse. An ancient evil must be resolved and reparation made. But the price will be great...