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.