A sequence of brief scenes follows a mother's relationship with her daughter, from her birth through childhood to her premature death as a young woman from an incurable disease. The mother, linguist Louise Banks, is lecturing at a Massachusetts university when twelve extraterrestrial spacecraft appear at twelve different locations across Earth. U.S. Army colonel G.T. Weber asks Louise to join physicist Ian Donnelly and find out why they have come. She is brought to an army camp in Montana near one of the spacecraft. Read more on Wikipedia.