Dr. Ian Gray (Michael Pitt) is a molecular biologist studying the evolution of the eye. He finds his work permeating his life after a brief encounter with an exotic young woman (Astrid Bergès-Frisbey) who slips away from him. As his research continues years later with his lab partner Karen (Brit Marling), they make a stunning scientific discovery that has far reaching implications and complicates both his scientific and spiritual beliefs. Traveling half way around the world, he risks everything he has ever known to validate his theory.
Justin Quayle is a low-level British diplomat who has always gone about his work very quietly, not causing any problems. But after his radical wife Tessa is killed he becomes determined to find out why, thrusting himself into the middle of a very dangerous conspiracy.