River detectorist Beau Ouimette and presenter and keen swimmer Rick Edwards go in search of evidence of the clashing Scottish clans embroiled in the civil war that raged across the British Isles in the 17th century. Fights erupted during this period between the Royalists supporting the King and the Covenanters wanting more power for church and state. Starting on the River Lochy, situated in the shadow of Ben Nevis, the pair hunt for evidence of the 1645 Battle of Inverlochy - a pivotal fight that saw the Royalist army launch a surprise attack against the ill-prepared Covenanters.

Beau Ouimette, Rick Edwards and Gary Bankhead travel to Colchester, Essex, to find evidence from the second English Civil War in what became the longest siege in British history. Finds include a short-barreled Carbine gun which was commonly used by the Cavalry in the 1600s and a horse stirrup believed to be from the 1648 siege due to it's age and position on the river bank.