Two homicide detectives investigate a series of brutal murders in the mountains of southern Arizona during an unusually hot summer. The detectives are on the trail of what they believe is a serial killer, but they soon discover something much more sinister.

In the frozen Antarctic wilderness, a team of Australian scientists vanishes without trace. Their last known location: a remote research facility. Trouble is, the outpost was abandoned years ago… When Major Ray Drexler and his highly trained DARC team is sent to investigate, it becomes clear this won’t be the straightforward search-and-rescue they were promised. […]