The pilots of Crossair Flight 3597 struggle on their approach to Zurich Airport, hampered by bad weather, an understaffed control tower, and a runway using antiquated equipment. By the time they decide to abort the landing, it's too late. The plane plunges into a hillside, killing 24 of the 33 on board. It's Switzerland's worst air disaster in over a decade and investigators are pressured to find answers fast. What they discover is a series of errors that will lead to sweeping changes to the airport and to the airline.