 In Berlin, the aircraft propulsion engineer Kyle Pratt (Jodie Foster) is grieving the loss of her beloved husband, who felt from the roof of their building. She quits her job and decides to travel with her traumatized six years old daughter Julia (Marlene Lawston) to bury the body in Long Island. While in the flight to New York, Kyle falls asleep, and when she wakes up, her daughter is missing. She requests a search in the plane to the captain, but nobody has seen her daughter, whose name is not in the flight manifest, disbelieving Kyle. She tries to convince the air marshal Carson (Peter Sarsgaard) that she is not delusional.