Tony Robinson and the Team descend on the historic Llancaich manor house to investigate an archaeologist's dream. An ancient moat has been discovered in the next field and no one knows what it once protected. It may have surrounded an early Welsh chapel, a Roman Fort, a fortified cattle enclosure, or even the ancestral home of one of Wales's most important families: the Pritchards. A big empty field with a manor house in it is what geophysics was invented for, but what should be a straightforward search quickly becomes one of the most baffling and frustrating investigations Time Team have undertaken for a long time. As the three-day limit approaches the digging becomes more and more frantic, as fields and gardens are overturned by the diggers trying to get to grips with the missing manor. Even if very little is as it seems, they do discover that the history of the site goes back thousands of years earlier than they expected.