Deep in the underbelly of New York City, a five year-old girl and her mother live among a community that has claimed the abandoned subway tunnels as their home. After a sudden police-mandated eviction, the pair are forced to flee aboveground into a brutal winter night. Determined to return home, they fight to find shelter as their world is thrown into chaos.
A darkness swirls at the center of a world-renowned dance company, one that will engulf the artistic director, an ambitious young dancer, and a grieving psychotherapist. Some will succumb to the nightmare. Others will finally wake up.
After the death of his older brother Joe, Lee Chandler (Casey Affleck) is shocked that Joe has made him sole guardian of his teenage nephew Patrick. Taking leave of his job as a janitor in Boston, Lee reluctantly returns to Manchester-by-the-Sea, the fishing village where his working-class family has lived for generations. There, he is forced to deal with a past that separated him from his wife, Randi (Michelle Williams), and the community where he was born and raised.