Bill Marks is a Federal Air Marshall for whom every day is the same until this one. On this plane ride, he starts receiving text messages from someone claiming to be on the flight and threatening to kill passengers. In a race against the clock, he must identify and stop the killer to save everyone on board.

While Liam Neeson is undoubtedly an asset, Non-Stop wastes its cast -- not to mention its solid premise and tense setup -- on a poorly conceived story that hinges on a thoroughly unbelievable final act.