In October 1859, the worst storm to hit Britain in a century drove the steam clipper Royal Charter onto the rocks off Anglesey, Wales, killing over 450 people and sending a cargo of Australian gold to the seabed. The film follows gold hunter Vince Thurkettle as he investigates the wreck site, tracing what is known about the ship's final hours and the fortune it carried home from the Australian goldfields. Interviews with historians and divers fill in the storm's scale, the scramble to salvage what could be recovered at the time, and the stories of passengers who never made it ashore despite the coastline being visible. Thurkettle's search combines archival research with hands-on fieldwork along the Welsh coast, weighing what treasure might still remain buried in the rocks and sand after more than a century and a half. The result is part maritime disaster history, part active treasure hunt, anchored by one of the deadliest shipwrecks in British waters.