A SUNKEN GRAVE.AN OUTBACK RIDGE.A MULTI-GENERATIONAL HUNT FOR THE TRUTH.In 1890, a desperate surveyor fleeing a corrupt police inspector and a ruthless mining family, boards the ill-fated steamship SS Quetta with a stolen crate of mysterious core samples, before it plummets into the Coral Sea.Marine salvager Nicky Lang and her expert crew locate the historic wreck, only to discover that the true prize is a cryptic 130-year-old map pointing deep into the rugged Australian outback.As a ruthless corporate tycoon launches a high-tech hunt to reclaim his family's lost sovereign wealth, Nicky and her team must race across the red dirt of the outback to unlock the mystery of an ancient cavern before the legacy of greed buries the truth forever.