New York, 1980: three complete strangers – Robert Shafran, Edward Galland and David Kellman – make the astonishing discovery that they are identical triplets. Separated at birth, adopted and raised by three different families, the 19-year-olds had been completely unaware of each other’s existence until they are brought together by a stunning coincidence. Their emotional reunion grabs the media’s attention, and overnight the three brothers became famous around the world. But the triplets’ joyous reunion unearths an extraordinary and disturbing secret… a long-hidden mystery that goes far beyond their own lives, and could transform our understanding of human nature forever.