SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!
SPOILERS AHEAD
Topside Plot Summary and Synopsis
Deep in the underbelly of New York City, a five-year-old girl and her mother have claimed the abandoned tunnels as their home. After a sudden police-mandated eviction, the pair are forced to flee aboveground into a brutal winter night, threatening their future as mother and daughter.
Source: Wikipedia (CC BY-SA 3.0).