Denis Villeneuve’s sci-fi drama Arrival hit theaters in 2016 and earned rave reviews from critics, thanks to Amy Adams’ brilliant performance, Villeneuve’s excellent direction, and a mature, focused take on the alien invasion genre. But that doesn’t mean it isn’t confusing. In fact, Arrival’s focus on linguistics and space-time theory is tough to untangle, and only seems to get more complex the deeper you dive into it. But we’ve got you covered. If you’re ready to dig deep and don’t mind spoilers, here’s everything you need to know about Arrival’s confusing ending.

[Looper]