As scientists work to unlock the secrets of our most complex organ — the brain — some companies are blurring the line between where man ends and machine begins. Using technology as a cognitive supplement can do more than help heal the sick, it has the potential to  boost memory, creativity, motivation and even let humans communicate telepathically. In this film, we meet some of the world’s first humans with brain-computer interfaces. For them, the merging of man and machine has the potential to be life changing — but how far is too far, and how does this change what it means to be human?