A young British woman goes missing while trekking in the Caucasus Mountains. 
As days pass without any sign of her, her family’s concerns grow. What has happened? What does her sudden silence mean? Is she in danger? Does she need help? 
Her father and sister realize that passive waiting - waiting for answers that may never come - won’t get them anywhere. Time is pressing and they must act. A single wasted moment could make all the difference between finding the missing woman dead or alive. So they embark on a frantic search, a wild journey through Georgia and the South West of France that before long turns into a desperate life-and-death struggle as they cross paths with a ruthless killer on the lookout for his next prey.