In the sci-fi romantic action film, Levi Kane (Miles Teller) and Drasa (Anya Taylor-Joy) are military operatives tasked with guarding a mysterious gorge, cloaked from view to the outside world. Stationed in adjacent towers on either side of the gorge, they sign up for 12-month tenures and receive little information about their location. Their job is to stop alien-like creatures from exiting the gorge, but as their mission unfolds they realise everything is not what it seems and find themselves engaged in a struggle for survival. This film has a decent premise on paper and is easy to follow, but its execution is sloppy, with sub standard special effects and unrealistic CGI. Teller does an average job of his role, while Taylor-Joy is unconvincing as an elite sniper. Had promise but is a time passer at best.