The detectorists try to find a ring for a shepherd lost 60 years ago, and Mui takes on a phone found by an underwater drone. Her search for the owner goes international!

The detectorists join forces with the freedivers to find not one but two family heirlooms lost by a heartbroken daughter. Glass artist Peter turns old thrown away bottles into stained-glass beauty, and archaeologist Sam looks into what could be our oldest find by our youngest treasure hunter.