The world is ending.

Not in the dinosaurs-have-gotten-loose kind of way, with everyone running around screaming, but more like in the-sun's-about-to-blow-up-and-everyone's-going-to-be-toast way.

When Reya and Lux find out the truth, they hatch a plan to escape the dying planet by sneaking aboard the last rocketship to leave Earth. Their mum and dad are already at one of the new worlds, but everything starts to go wrong when Reya and Lux discover that their rocketship is going in the wrong direction. . .