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Alaska—a land of untamed wilderness and relentless tremors, where the ground beneath your feet can shift in an instant. For the 4th Brigade Combat Team Airborne, a routine night operation turns into a nightmare when a freak earthquake rips open the earth and sends them plunging into darkness.
But when they crawl out of the fissure, they’re not in modern-day Alaska anymore. They’ve been hurled 23,000 years into the past—into the heart of the Ice Age. Faced with impossible odds, prehistoric predators, and a world they no longer recognize, these elite soldiers must rely on their training and each other to survive.
Cut off from everything they know, they must find a way home—or carve out a future in a land that time forgot.