The ancient Chinese game of Go has long been considered a grand challenge for artificial intelligence. Mastery of the game by computers was considered by expert players and the AI community alike to be out of reach for at least another decade. Yet in 2016, Google’s DeepMind team announced that they would be taking on Lee Sedol, the world’s most elite Go champion. AlphaGo chronicles the team as it prepares to test the limits of its rapidly-evolving AI technology. The film pits machine against man, and reveals as much about the workings of the human mind as it does the future of AI.