Mel Fisher spent sixteen years and his family's savings chasing a rumor: that the Spanish galleon Nuestra Señora de Atocha, lost in a 1622 hurricane off the Florida Keys, still held one of the richest cargoes ever to sink. This episode of Myth Hunters follows the search from Fisher's early dives through the setbacks that nearly ended it, including the death of his son and daughter-in-law during the hunt. Historians and treasure-diving footage trace how archival research into Spanish shipping records narrowed the search area, and how sonar and magnetometer surveys eventually located wreckage scattered across a wide debris field rather than a single site. The film uses period maps, recovered coins, and interviews to explain why the Atocha became the benchmark case for treasure salvage, and what the eventual 1985 discovery of the main wreck actually contained. It is as much a story about obsession and financial ruin as it is about gold, framing Fisher's decades-long gamble against the real odds any single wreck hunt faces.