In 1977, a group of twelve techies, from Silicon Valley, go backpacking in the Grand Canyon. But only eleven hike out. Stephen’s death was an accident. Not everyone was so sure. Thirty years later, the hiking group gathers again, some now millionaires in Palo Alto. When another accident occurs, forensic engineer, Mackenzie Cleyborn, and Santa Clara detective,Trejean Baptiste, suspect the hikers.....