Merton cross swords with an old adversary who sheds some light on the circumstances surrounding his demotion from CID when a man who has been presumed dead for 20 years returns to Aidensfield and seems to have not aged a day. Meanwhile, Vernon and David enter the world of vineyards when they befriend a young Frenchman who thinks their cottage is the perfect place for wine-making. Elsewhere, Blaketon organises a treasure hunt to raise money for a local playground and inadvertently acts as cupid for Mike and Tricia.