This is the breathtaking story of Daniel Tammet. A twenty-something with extraordinary mental abilities, Daniel is one of the world’s few savants. He can do calculations to 100 decimal places in his head, and learn a language in a week. Daniel T. is a "super brain." He can calculate numbers to hundreds of decimal points in seconds and learn new languages in a week. Through a series of real world challenges and complex number problems, Daniel's amazing abilities are demonstrated. This documentary follows Daniel as he travels to America to meet the scientists who are convinced he may hold the key to unlocking similar abilities in everyone. He also meets the world’s most famous savant, the man who inspired Dustin Hoffman’s character in the Oscar winning film ‘Rain Man’.