Discovering a granite deposit of epic proportions is geologist Cleo Cooper's dream come true. Not only will she be famous for discovering the easternmost deposit in the United States, she'll also be rich. And so will Gladys Walton, the owner of the rural property that sits atop the bounty of valuable rock. Then Gladys goes missing and a murder victim turns up in the well, and a near-fatal accident convinces Cleo that someone is dead-set on killing her, too.