Emily is preoccupied calming the group's jitters about the outback's killers, from sunstroke to snake bites. But when a fellow traveler turns up dead, Emily fears something far more toxic has struck: human greed. Someone has stumbled upon a natural wonder that could turn science on its head -- was this priceless discovery the catalyst for murder? Before the dust settles, a second untimely death occurs. If Emily can't stop a killer in their tracks, this Aussie adventure just may be her last.