Reeling from the brutal murder of his wife, air traffic controller Nick Jensen throws himself into his work at Logan International Airport in Boston. Returning to the operations room from a break, he sees three heavily armed men dressed in black fatigues and patrolling the corridors of the supposedly secure FAA facility. After having murdered two armed guards, the terrorists have unfettered access to the control tower while the president of the United States is nearing Logan Airport. To dismantle the terrorist assassination plot, Nick must risk everything.