Robert John Langdon has spent the last six years mapping the prehistoric sites of Wiltshire, England - including over 1000 prehistoric monuments. This endeavour has led Robert to develop a revolutionary hypothesis that these ancient monuments were built on the shorelines of the 'Post Glacial Flooding' that occurred directly after the last Ice Age. Proof of his theory can only be obtained if we find evidence of these paths that lead from these harbours to our ancestor's trading places such as Avebury. Then one day in September 2014 something incredible happened on a hill just outside Avebury - the consequence of which will not only re-write the prehistoric history Britain, but possibly the world. For a newly discovered, trackway was found that goes from one of these suspected ports 'Silbury Hill' to Avebury, for the first time in history, directly connecting the two sites. This is the TRUE story of that eventful day and the consequences of this monumental discovery