Arrival tells a story about alien life forces known as Heptapods taking residence in different parts of the world in dome-like objects. Floating in the sky, they make no moves to attack. In order to make contact with the aliens, the military hires Dr. Louise Banks (Amy Adams), a notable linguistics professor, to translate their language and ask what their purpose is for being on Earth. With the help of theoretical physicist Ian Donnelly (Jeremy Renner), the duo sets out to solve the complicated puzzle. Meanwhile, the entire world becomes anxious about these visitors, causing havoc and mayhem amidst the confusion.
Source：https://www.cbr.com/arrival-movie-ending-explained/
