The sci-fi adventure that began with Yesterday continues with a thriller that can also be read as a standalone.

2063, United North America: climate change has rendered great swathes of the country uninhabitable, the rise of robot workers has created mass unemployment, eco-terrorism is a constant threat and a 2059 nuclear exchange between Pakistan and India has torn large holes in the world's ozone layer and pushed humanity's existence towards a cliff.

Garren and Freya have managed to escape that nightmare world and lose themselves in 1986 Vancouver. But the future's reach is long, and they're no longer safe there. No one is. Shadowy forces are intent on influencing the past's path. And when Freya is taken, it's up to Garren to save both her, and the future.