During a routine flight, the pilot Andrea Schubert encounters a mysterious and dangerous weather phenomenon. By making a radical change in her flight plan, she’s able to avoid the storm and safely land the plane along with its 120 passengers at a small community airport. Although celebrated as a hero, Andrea is suspended, because she had followed her own instincts instead of the control tower’s instructions. Her career as a pilot is threatened. Unwilling to give up the profession she so passionately loves, she starts to research the existence of the so-called “Supercells” – sudden, violent storms capable of causing a plane to crash. At the recommendation of the meteorologist Guttmann, Andrea travels to the Styrian Alps to conduct her research. There she meets the brothers Tom and Bernie, both pilots who run the local hail flying squadron and have recently experienced extremely intense and unexplained weather patterns similar to what Andrea had endured. During one of his flights, Bernie is suddenly caught up in an unusually violent storm and crashes his Cessna, he loses his  license. In order to help the brothers stay in business, Andrea takes over for Bernie. With the help of Guttmann they carry out an extremely dangerous experiment – Andrea wants to fly directly into a supercell to measure its intensity…