Based on Daniel Tammet's autobiography "Born on a Blue Day". The 28-year-old Tammet, a Brit, speaks at least seven languages. He is most recognized for becoming the first person to recite 20,000 digits of the letter pi by memory during an appearance at Oxford U.

In his autobiography, Tammet describes how he sees colors and numbers, providing a rare glimpse into what it's like to be autistic. The book was published in the U.S. earlier this year by Free Press.