Lured back to his boyhood Montana home, Kade's trip down memory lane isn't all fresh asphalt and sunny skies. Someone's been busy around Fort Black.

The Storm Z is rallying—the international mercenary group known for their Russian ties is now a rogue element with access to compromised nuclear codes. All signs indicate an imminent launch.

Then there are the shadowy criminal links to a secretive cabal. Mob ties. Cartel funding. The main suspect's identity lost in a dizzying blitz of false intelligence that points directly at Kade.

He's got little time to find the culprit, a madman intent on extreme destruction. But the nationwide dragnet to stop Kade is closing in.

Intent on going it alone, Kade doesn't know he still has allies. In San Francisco, Harper launches an independent investigation under the watchful eye of her new minders. Suspended from the FBI, she'll be forced to work outside the law to unravel the mysterious events surrounding Sergei's death.

Harper risks losing her badge for good. And as Kade delves into the shadows of the glacial peaks of Montana, he'll unearth secrets long buried and be forced to wrestle with an uncomfortable truth:

Was Hiram right all along?