Decades ago, archaeologists found rolls of dusty manuscripts dating to the 1st century AD hidden in caves in Israel. But one of these manuscripts wasn't written on leather or papyrus - it was inscribed on a copper scroll! Scholars believe the copper scroll is an inventory list of treasures from Jerusalem's Second Temple, and holds clues to their whereabouts. But where is the treasure today? In his search, Josh rappels into caves outside Qumran, creates his own copper scroll, and uses ground-penetrating radar inside a newly excavated tunnel hundreds of yards underground in search of the lost treasures of the Copper Scroll.