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Two years after Flight KA29's hijacking, Sam Nelson is thrust into another life-threatening ordeal—but this time it's personal.

Sam urges Otto to keep his cool as passengers begin to suspect something is wrong. Police Chief Winter races to mount a response.

Berlin police scramble to contain the situation. Sam pressures Winter to meet his demands. Marsha discovers she's being watched.

A shocking turn of events forces Sam to make a gesture of good faith. In London, Daniel calls on a friend to help look into what's happening in Berlin.

Anger and frustration among the passengers begin to boil over—just as Sam comes to a frightening realization.

To avoid further disaster, Sam must work with an unlikely ally. The enemy closes in on Marsha as Zahra and Daniel fear they've reached a dead end.

Sam gambles on a dangerous tactic in hopes of outsmarting the police. Armed with new intel, Olivia tries to influence Winter's next move.

With the handover imminent, Sam is prepared to put his life on the line to save Marsha—and expose the truth.