A party of hunters stumbles upon a desiccated human hand, a feisty grandmother meets an untimely death in her own kitchen, and the broken remains of a World War II-era transport plane emerge from the face of a calving glacier. It's all in a day's work for Sergeant Liam Campbell of the Alaska State Troopers. And 60 years ago is like yesterday.

Two thousand people go missing in Alaska every year. They vanish in the middle of mountain footraces, on fishing boats in the Bering Sea, on small planes in the Bush. Now a geologist known for going walkabout with his rock hammer has disappeared from the Suulutaq Mine in the Park. Was it deliberate? An accident? Foul play? Kate Shugak may be the only person who can find out. But for the fact that Kate, too, is among the missing....

It is New Year's Eve, nearly six weeks into an off-and-on blizzard that has locked Alaska down, effectively cutting it off from the outside world. But now there are reports of a plane down in the Quilak mountains. With the NTSB (National Transportation Safety Board - responsible for investigating aviation incidents) unable to reach the crash site, ex-trooper Jim Chopin is pulled out of retirement to try to identify the aircraft, collect the corpses, and determine why no flight has been reported missing. But Jim discovers survivors: two children who don't speak a word of English.

The residents of Alaska’s largest national park are stunned by the death of one of their oldest members, 87-year-old Old Sam Dementieff...even private investigator Kate Shugak. Sam, a lifelong resident, dubbed the “father” of all of the Park rats - even though he had no children of his own - was especially close to Kate, his niece, but even she is surprised to discover that in his will he’s left her everything, including a letter instructing her simply to, “find my father".

"When the Betelgeuse message was detected, it changed a lot of things on Earth. We began to look seriously outward, not with the heady optimism of the early days, but with deliberate calculation. We knew that Someone was out there, and that eventually, they’d be coming. If Earth didn’t occupy the High Frontier, it could be ours to lose."