Hannah is a fusion scientist working alone at a remote cottage off the coast of Scotland when she sees a figure making his way from the sea. It is a visitor from the future, a young man from a human settlement on Mars, traveling backwards through time to try to make a crucial intervention in the fate of our dying planet, and he needs Hannah’s help. Laboring in the warmth of a Scottish summer, Hannah and the stranger are on the path towards a breakthrough --- and then things go terribly wrong. Joe Mungo Reed’s novel expands from this extraordinary event, drawing together the stories of four lives reckoning with what it means to take fate into their own hands, moving from the last days of civilization on Earth through the birth of another on Mars.

Sol and Liz are a couple on the cusp. He’s a professional cyclist in the Tour de France, a workhorse but not yet a star. She’s a geneticist on the brink of a major discovery, either that or a loss of funding. They’ve just welcomed their first child into the world, and their bright future lies just before them --- if only they can reach out and grab it. But as Liz’s research slows, as Sol starts doping, their dreams grow murkier and the risks graver. Over the whirlwind course of the Tour, they enter the orbit of an extraordinary cast of conmen and aspirants, who draw the young family ineluctably into the depths of an illegal drug smuggling operation.