Professional New Zealand treasure hunter Jake Donovan is startled when his adult daughter Kelsey turns up, reporting her mother was buried a month ago and wanted her to meet him, yet acts bitterly hostile. However she stays for the good company of Jake's former protégé and hunky diving partner, marine biologist Dillon Ward, who broke with his dad, a tycoon, to devote his life to conservation. Jake's crush on lighthouse-keeper's daughter Iris surprisingly intertwines with the hunt for the sunken Golden Crown.