From the crash of Air France flight 447 between Rio and Paris into the Atlantic in 2009, to the Germanwings flight 9525 crash in the Alps in 2015, the French investigators of the BEA (Bureau of Enquiry and Analysis for Civil Aviation Safety) are called upon worldwide to determine the causes of air accidents. Line planes, helicopters, ultra-lights: BEA is investigating everything that flies. For the first time, they have allowed cameras to film their often confidential work. This documentary meets technicians and meteorologists, even ophthalmologists and acousticians, who are able to determine the causes of an accident from detailed details. It also follows the two-year search and recovery effort for an aircraft engine that went missing over the Greenland Ice Sheet.

Du Rio-Paris abîmé dans l’Atlantique en 2009 au crash de la GermanWings dans les Alpes en 2015, ils sont appelés dans le monde entier pour déterminer les causes des accidents aériens, afin d’éviter qu’ils ne se reproduisent. Les enquêteurs français du BEA (Bureau d’enquêtes et d’analyses pour la sécurité de l’aviation civile) sont considérés parmi les meilleurs au monde. Avions de ligne, de tourisme, hélicoptères, ULM ou montgolfières, ils enquêtent sur tout ce qui vole.