Archaeologists Tony Pollard and Neil Oliver examine the 1642 Battle of Edgehill in Warwickshire, where almost 30,000 Roundheads and Cavaliers fought the first major engagement of the English Civil War. The pair discover that no archaeological work has ever been done on the site, and, before they don period costumes to test their 17th-century pistols, their excavations uncover long-lost buildings standing at the time of the conflict.