A flap malfunction. Cell phone interference. A language barrier. A drug-impaired pilot. Something made Crossair Flight 498 to crash quickly after takeoff, but what? Examiners at the Swiss Aircraft Accident Investigation Bureau have plenty of leads, but few concrete answers. Join their attempts to piece together the charred fragments of the catastrophe that claimed the lives of all aboard. Then follow the investigation to Russia, where a cluster of accidents bearing an eerie similarity to Crossair may help them finally solve this puzzling case.