Humanity’s wake-up call. Answer it or face extinction. When Bleu’s little sister shows symptoms of the deadly Sickness, a strange vision directs him to leave humanity’s subterranean haven and seek the cure on Earth’s glacial surface. Joining the expedition team, Bleu expects extreme temperatures, not a surface ruled by ingenious predators. Rana and her fellow star beings have co-existed with Earth’s top carnivores since the humans disappeared. But when her peers transform into Crowned Ones, the final stage of star being development, she fears remaining Uncrowned like her parents. To prove her worth, she undertakes a dangerous mission—contacting the hostile and nearly extinct humans. But Rana’s plan backfires, and Bleu’s team retaliates. As war with the more advanced star being civilization looms, both Rana and Bleu separately seek a way to save their people.

They thought the biggest problem they faced was each other. After Bleu, Rana, and their new friends narrowly prevent war between the star beings and humans, they hope the upcoming negotiation will secure the peace. Newly emerged from their subterranean haven, the Northern Haven humans are clearly not suited to Earth’s ice age, and require assistance from the enlightened star beings to survive long term on the Surface. But Commander Savas doesn’t trust the suspiciously kind star beings and their unexplainable abilities. When both sides reluctantly negotiate a joint mission to find the other Havens, Bleu must somehow cooperate with the manipulative commander to keep his friends safe. As their team confronts unexpected dangers, Bleu and his teammates begin to suspect the star beings don’t know as much about the Surface as they claimed, while Rana is torn between remaining true to her nonviolent ways or becoming more human to survive. When an unnatural predator attacks, even the nearly all-knowing Kalakanya can’t explain it. Now the team must pull together or their new discovery will pull them apart, limb by limb.