A girl is among the few survivors of a dystopian Earth. Riding a war tank, she fights against the tyranny of a mega-corporation that dominates the remaining potable water supply of the planet.

In Greta Gerwig's solo debut, a teenager (Saoirse Ronan) navigates a loving but turbulent relationship with her strong-willed mother (Laurie Metcalf) over the course of an eventful and poignant senior year of high school.