From the Introduction:
The village of Silcestre stands on the site of an old Roman town named Calleva Atrebatum, a name mentioned in the Praesidia Finium or Frontier Garrison, a series of rare scrolls noting strange places in Britain in 155 A.D.
Now, in the late summer and early fall of 1002 A.D., either the church has sent a small group of people to the village of Silcestre to learn of the vague rumors mentioned in the Praesidia Finium or they have stumbled upon it by accident. The incomplete record indicates dwarves lived in the area and were friends to the Romans once upon a time. It also notes a certain leader of the Roman village never aged. Little else is recorded. Perhaps they are just rumors after all.
This Cthulhu Dark Ages scenario takes place in the summer or fall of 1002 A.D. in England, specifically in the village of Silcestre (now Silchester) in Hampshire. It is written as a sandbox scenario and requires the investigators to pursue their objective. The scenario does not have a set storyline, though a potential progression of events is presented.