nd Anna Pigeon is slinging hash in Yosemite National Park's historic Ahwahnee Hotel. Four young people, all seasonal park employees, have disappeared, and two weeks of work by crack search-and-rescue teams have failed to turn up a single clue; investigators are unsure as to whether the four went AWOL for reasons of their own - or died in the park. Needing an out-of-park ranger to work undercover, Anna is detailed to dining room duty; but after a week of waiting tables, she knows the missing employees are only the first indication of a sickness threatening the park. Her twenty-something roommates give up their party-girl ways and panic; her new restaurant colleagues regard her with suspicion and fear. Yet when Anna's life if threatened and her temporary supervisor turns a deaf ear, she follows the scent of evil, taking a solo hike up a snowy trial to the high country, seeking answers. What awaits her is a nightmare of death and greed - and perhaps her final adventure.