It concerns the creation of an artificial "miracle food" and the actions of two ghostly monks when the factory is set up in their former monastery.
He speaks of their confinement to the earthly plane in scientific terms, while Brother James has only read Lives of the Saints.
After each day's production they send the entire batch back to when they were alive, much to the gratitude of the monks then, who regard the sudden appearance of delicious nutritious food as a miracle.
They live in the time of the Anarchy, when rival claimants to the throne sent their armies across the land, disrupting society and the food supply.
The company sends in a scientist, Sidney Meredith, who has enough equipment to detect the ghosts, something Brother Gregory quickly realizes.