A distinct lack of chemistry between the two leads rather limits our investment in their up-and-down relationship, while the workaday CGI ensures much of the action remains resolutely studio-bound.

Horizon Line wants to be a tense, white-knuckle ride but is let down by performances of wavering conviction, some awful dialogue and aerial hijinks that are increasingly ridiculous. Still, the more outlandish the film gets, the more fun it is to watch.

Horizon Line has an interesting concept and starts off well, which peaks the viewers' interest.

It has a decent premise and is compact and nicely paced, but this trapped-in-a-plane thriller eventually nose-dives due to uninteresting characters, lack of suspense, and too much preposterousness.