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Nine people survive a plane crash into the Mexican jungle. But they don’t know that a murderer lurks in their midst… Nine days later, their bodies are recovered by the Mexican army. One of the passengers is missing...but who?

Alliances form, enemies are made and lines are drawn as the passengers search for food and water; but when another passenger dies, they realize they may all be targets.

The survivors work out how to call for help - but are faced with a treacherous climb; as some of the group begin to crack under the pressure, a third death - the most violent so far - warns that they are running out of time.

The deadly secret hidden in Flight CBZ517 is discovered, but it still doesn't explain the murders or help the survivors escape; the passengers believe they have found the traitor in the group - but are they right?

Air authorities search desperately for the plane and federal agencies spring into action; as the group becomes smaller and smaller, the last survivors know they are going to have to fight to stay alive.

A high-octane showdown between the killer and one of their supposed victims reveals the secrets of flight CBZ51.