Master demolition expert Bartholomew Grimes accepts a contract to destroy a four hundred year old cathedral in Westermarch, only to discover an ancient pagan temple sealed beneath it. When mysterious deaths plague the city council, he realizes the demolition is weakening supernatural bindings. With his apprentice Cornelius and archivist Margery, Bartholomew pioneers a radical solution, simultaneously dismantling the cathedral while building a new chapel to maintain the sacred containment, honoring both progress and the power of ancient thing.