Earth's last refugees. A one-way trip. A world of terror.

Time is up. Earth is collapsing. Eight billion people and countless other living things will die. Bridgers Infinity Fowler and Desmond Weaver have one last chance to save a handful of refugees. And one last chance to have a life together.

Earthquakes and storms threaten to destroy humanity's last hope-the SafeTrek bridging facility. With the building literally collapsing around them, Infinity, Desmond, and a small group of refugees manage to bridge out. Their destination: an alternate world similar to their own. A place that will be safe.

But something goes wrong, and they find themselves in a world unlike any they could have imagined. Their attempt to start a new life becomes a struggle to survive in a place where primeval violence rules, where nothing is familiar and everything is potentially deadly.

For the refugees, this is a one-way trip. There's no going home. To survive, they must learn to work together. But something extraordinary exists here, something that could turn them all against each other. Something that could destroy the bond between Infinity and Desmond.