Caution: this review contains major spoilers for the film.
It’s hard to talk about Arrival without spoiling the film. So much of what makes it more than just a well-done first contact story is tied up in its later developments. They recontextualize enough of the prior proceedings that trying to discuss the import or quality of the film without taking it as a whole is like trying to give someone directions without letting them know the destination.
But its premise is deceptively straightforward. In the world of Arrival, aliens have come to Earth in twelve ships scattered across the globe. Louise Banks (Amy Adams) is a linguist brought by the U.S. Military to a ship located in Montana, in an attempt to help humanity communicate with this extraterrestrial presence. With the help of theoretical physicist Ian Donnelly (Jeremy Renner) and a buffer provided by Colonel Weber (Forest Whitaker), Banks slowly but surely finds ways to speak with these seemingly unknowable beings, with the American team alternatively working with and against similar groups around the world attempting the same.