Time Team travels to Somerset to investigate the discovery of an exquisite Roman mosaic in a field. The geophysical survey clearly indicates the presence of a substantial and well-preserved villa on the site. One of the main problems they tackle is the development of the building complex through time. By targeted examination of the structural remains, the archaeologists uncover evidence of several phases from a more humble early timber building to a two-story grand villa with two large ranges and a courtyard gate structure. In the end, the site turns out to contain one of the largest Roman villas in the UK.