The team dive deep to search for a precious tankard lost by a heartbroken son, and detectives Mui and Sam work together to try to solve the mystery of a drone found in Ullswater.

The detectorists climb the fells at Crummock Water in blistering heat, hoping to find a bracelet given to a heartbroken daughter by her late father. The freedivers are out in force searching Ullswater for a precious pendent, and jeweller Nisha turns old damaged coins into treasure again.