The fifth plane wasn't meant to be hijacked, it was a contingency.
Designed for remote takeover if any of the original four failed, it was the fail-safe meant to guarantee shock, chaos, and a pretext for war.

Ethan Cole, a retired airline pilot, was unknowingly at the center of that plan. His scheduled flight on 9/11 was grounded at the last minute, and for over two decades, he chalked it up to luck. But when his former co-pilot dies under suspicious circumstances, Ethan receives a cryptic message: "We were never supposed to take off."

As he begins to investigate, Ethan uncovers a buried truth, the Defense Advanced Research Projects Agency (DARPA) and private aviation contractors were testing remote flight override systems that day. And someone hijacked that technology, not foreign terrorists, but rogue elements within the system itself.

Now, a new generation of that same tech is about to be deployed globally under the guise of safety and automation.
And Ethan holds the only proof that it was born from the darkest conspiracy in modern history.