The owners of a Tudor house, High Ercall Hall, want Time Team to investigate a bloody confrontation between the Roundheads and Cavaliers during the English Civil War, 350 years ago. In front of the house are four mysterious arches. Could they be relics of an older, medieval building, which apparently stood here for centuries before the present building? They are joined by buildings expert Richard K. Morriss, and Civil War specialist Glenn Foard.