Le sang dans nos veines

When Cyril discovered that his family name was extremely rare, and probably unique, he became curious… Why, outside France, are the bearers of such an unusual name all in the USA? Does he have any “American cousins”?
At the start of the film, he has an appointment with a psycho-genealogist, whom he has asked to investigate…

Cyril is a documentary filmmaker. He suffers from a rare genetic disorder called Celtic mutation, which is very difficult to detect.
While filming in the USA, he decides not to return to France, but to meet his “cousins” and warn them that they too may be carriers of the same mutated gene…

And so begins an odyssey across America: yesterday’s America, today’s America, Trump’s America and tomorrow’s America. An intimate, scientific and human odyssey that takes us through a history of migratory movements, from the Neolithic to the imminent end of white America…