In Northern Belgium lies the site of the infamous battle of Passchendaele, fought in 1917, a place where man and beast drowned in a churning sea of mud. As the team unearth the remains of a complex trench system, they discover one of the first modern wristwatches– a technological innovation that was born of war. Forensic investigation reveals letters are etched onto its strap - a discovery that launches a journey to identify its owner, a soldier, one of the Fallen. The search leads to John Humphrey England, a Second Lieutenant under the Welsh regiment, who died in the mud of Passchendaele July 31 1917. But this quest has a twist in the tail.