They call it the Event--an unimaginable cataclysm that renders 600 million years of the world's timeline into jumbled fragments.
Our Earth is gone, instantly replaced by a new one made of fractured remnants of the past, present, and future.
All exist alongside one another in a nightmare patchwork of time shards--some hundreds of miles long, and others no more than a few feet across.
Crossing it sends them on a final quest spanning time, space, and dimensions.
Only then will they learn if their mission will save their world--or destroy it.