After eight long years, Sasha McCandless is about to make partner at a prestigious law firm. When a plane operated by her client slams into the side of a mountain, killing everyone aboard, Sasha gears up to defend the inevitable civil lawsuits. She soon realizes the crash was no accident: a developer has created an application that can control a commercial plane's onboard computer from a smartphone.

Sasha joins forces with a federal air marshal, and they race to prevent another airline disaster. But when people close to the matter start turning up dead, Sasha must rely on both her legal skills and her Krav Maga training to stop the madman before he kills her.