Henry IV's son, later Henry V, proved an effective military leader. Aberystwyth Castle was lost in 1408 and Harlech Castle in 1409. Thereafter, Glyndŵr was a fugitive in the mountains.

In this short film we see Adam and Vee exploring Harlech Castle, where they investigate the environment to see what clues they can find that tell them more about the history of the site.