Three ancient hominids unite to fight brutal invaders in the last surviving forest of a shattered world.

74,000 BCE. The Toba super-eruption has plunged Southeast Asia into a volcanic winter. In this apocalyptic wasteland, survival lies only in rare, sheltered pockets of land—refugia.

One clan finds such a haven: a lush mountain forest shielded from the ash-choked world beyond. Among them is Last—small, weak, an outcast. His only mission is to protect his eight-year-old brother, the only family he has left.

But when an advanced human species invades, slaughtering the clan and enslaving the survivors, Last must forge a desperate alliance with two dangerous forest hominids—one dwarflike, the other monstrous—to rescue the boy he loves.

Refugium is a fact-based prehistoric thriller set against one of Earth’s deadliest extinction events.