Here we have a reasonably entertaining science fiction adventure that could have been exceedingly good but is somewhat spoilt by the course of the narrative that opts for a rather daft romance over interesting tensions and rivalry. The set up here is good fun if a little derivative and it reminded me of Annihilation (2018), a far better film, with influences of Jules Verne's Mysterious Island and some Aliens (1986) vibe thrown in for good measure. Miles Teller is Levi, a former elite army sniper now on the skids and haunted by his kills, who gets recruited by a shady spook in the form of Sigourney Weaver. His job is to guard a mysterious fog covered gorge somewhere in the world for one year. He has to prevent whatever is in the gorge from getting out. On the other side is his Russian counterpart guarding that side and both have strict instructions not to interact with one another (for reasons unexplained). But as the Russian turns out to be Anya Taylor-Joy soon romantic sparks across the gorge do fly eventually resulting in Levi finding a way to get across for some nooky. And yes you guessed it events conspire to ensure that they end up in the gorge where they find some very strange and nasty things. It's the romance that actually spoils this film. It never rings true and is actually unnecessary even though we get a Bourne Identity type ending. Whilst this is entertaining and the film ramps up nicely once we get into the gorge itself it's one of those films that could have been very interesting indeed. What's here is ok though, it just lacks the vital ingredients to to great.