His name struck awe and fear across two continents. His ruthless troops conquered two-thirds of the known world and hauled most of the wealth of Europe and Asia back to his Mongolian mountain stronghold. When Genghis Khan died in the middle of a campaign, his sons buried him with his entire fortune in a remote valley, then slaughtered the burial party to insure the secrecy of the site.
Neither his body nor a trace of his riches has ever been found.
In "Genghis", my 100,000 word historical novel, a Thirteenth-Century workman in the Khan's burial party pilfers a gold coin from the treasure. He manages to survive the massacre of his co-workers, and passes the coin, along with a cryptic clue to the burial site's location, down through twenty-seven generations of nomadic herders. Along the way the coin is cut in two.
Now the workman's descendant, Tova, a green-eyed Mongolian physician, has half of the coin. She's the first woman to possess it. Alex, a Native-American geologist, has been given the other half by an old guy in a nursing home, along with the story and the clue. Tova and Alex both want the treasure, and both think they can find it. Though neither knows of the other's existence, they are about to discover that they need each other if they are to succeed, or even survive.
See the problem here is you forgot the sons. You know damn good and well the oldest one told his younger brothers to go look for four leaf clovers and when the kids did..Eldest dug up the treasure and retired to Florida to write crime novels. Another winter on the steppes?? feh.
This is a cliche ridden buried treasure story the way you present it here. If it's not, you'll want to try again.