Jack Prester is already in the area before the trouble begins this time. He’s in Tucson for Rangerfest, an annual gathering of those who work in the parks. When two grad students’ bodies are found in one part of Saguaro, his boss asks him to look into it. Jack quickly finds that there are multiple local agencies trying to get in on the investigation, which makes things more complicated. But the greatest complication is the attack on Jack. If he survives, can he figure out what is going on?