In this framed story, Walt Longmire and Henry Standing Bear tell the story of an adventure in Alaska during their youth in 1970. They've both made it out of Vietnam in one piece, but Walt has taken a security job on an oil rig off the coast of Alaska rather than go home to Wyoming. He seems to be working the job to forget and to give him time to drink. Henry goes to visit him.
After one of the security team goes berserk on the rig, Walt takes his place on a routine U.S. geological seminar collecting worms, with Henry accompanying. The pleasant but nerdy young geologist, Wormy, needs to collect these worms so that the government can determine if a large portion of Alaska should become a wildlife refuge. They fly from the rig to the site with a CAT, Blackjack a bear sniper, the CAT driver, Wormy, the pilot, co-pilot, navigator-radioman. I may have forgotten a man or two. They have a limited time to complete the survey because a major storm is heading their way.
After seeing a huge polar bear near the geological site, Walt and Henry get out of the CAT to make sure the bear is not following the CAT. Henry discovers and rescues a living baby bear in a den with a slaughtered female bear and cubs. Then they trek to the site to find the CAT and a frantic CAT driver, Marco. As Wormy was making his collections, the huge polar bear got him and killed him. By the time they make it back to the plane, the storm is hitting. Matt the navigator reports that the radar shows a ship nearby. While Walt and Mike the pilot tie down the plane, Mike disappears, presumably killed by the bear. The storm is so fierce that it breaks the plane loose and topples it to where the ship, a ghost ship, is caught in the ice. The survivors take refuge, they think, in the ghost ship, not realizing that the giant polar bear is stalking them. From then on, we have a cat and mouse, or rather a polar bear and prey, chase around the ship.
When I saw the cover, I thought the story might not measure up to Johnson's usual standards. Was I wrong! Like Agatha Christie's And Then There Were None, the gripping story kept me up late with its blood stains and dragged off bodies. Although I knew Walt and Henry made it out alive (or how could there be all the other books in the series?), it was still a nailbiter. Johnson capitalizes on the isolation, the monster bear, and the ghost ship to make the book hard to put down.
The cub seemed a weak part of the story to me, and I didn't understand the worms which seemed to be geological things that looked like worms rather than actual worms (maybe I was reading too fast), but I was willing to suspend my disbelief. This is a secular story, so it has language issues. Another question was whether century-old liquor remains liquid at twenty below zero. However, it is a story full of tension and excitement, a fun read for those who like thrillers.