There are only two things you actually need to know about Snowpiercer.

1. What happens in the movie is this: Captain America fights a train. …well, okay, everyone in a train, not the train itself. But I’m not joking. If you want to see a movie where Captain America fights a train from one end to the other, this is that movie.
2. The premise of the movie is this: What if we actually listened to scientists about global warming and the looming danger to our species, and did something about it, and the thing we did was seed the sky with some kind of science chemical that would lower temperatures, and we did this seeding via the contrails coming out of planes, and the end result was that oops, over-correction, the world is completely frozen now and has been for the past 17 years, and everyone is dead except for this one train full of people.

I’m not even kidding. The premise is don’t listen to the science on global warming, or we’ll all die because of chemtrails. I’m not sure a movie has ever made me this angry this quickly. It was less than two minutes in!

Anyway. If you can get past that (and maybe you shouldn’t be able to), the rest of it with the train-fighting by Steve Rogers[1] is mostly entertaining; I think the highlight is the truly surreal sushi dinner, but there’s also all the fighting and shooting and dark humor about classism and religion. Taken as a whole and with a different initiating event, I might have liked it quite a bit.

Also, though, it doesn’t make a lick of sense if you think about how any of it works. Like, nevermind the why of it, if you just accept that the planet froze and there’s a train going around the world with the last survivors of humanity on it? And also there are sharp, militarily enforced divides between the haves and have nots? No part of that survives really any scrutiny at all. So, y’know, turn your brain off.

[1] Okay, I may have exaggerated a few times. It’s not literally Captain America, it’s just Chris Evans in a slightly different role than normal. That said, I didn’t think Knives Out had Captain America as a murder suspect, so.