Paul Wood is a modern vagabond, a man who chooses to leave the comforts of San Francisco to spend months backpacking through some of the world's most challenging terrain. While hiking in the Himalayas, Paul gets more of a rush than he bargained for when he finds the body of a murdered hiker - mutilated in a way he has witnessed once before, in Africa, years ago and thousands of miles away.

The police in Nepal, anxious to quell a scandal, close the case and declare the victim a suicide. Only Paul is left to search for answers. He reaches out to his farflung tribe of fellow backpackers for help, and his discoveries lead him to a terrible conclusion: a killer is stalking the international backpacker trail, preying on victims in wild places far beyond the reach of any authorities. A killer whom Paul may already know.

Finding the murderer becomes an obsession that leads Paul from Himalayan peaks, through the jungles of Indonesia, across the bleak Sahara desert -- and into some of the darkest places imaginable...