Manchester by the Sea

After his brother's death, Lee Chandler is named guardian to his 16-year-old nephew, Patrick. This forces him to return to his hometown and confront his past.

Affleck, a specialist at playing reticent, somewhat mysterious men, plays Lee Chandler, a loner who lives in a cruddy basement apartment in Boston and works as a janitor. The death of his beloved older brother Joe (Kyle Chandler, seen in many generous flashbacks) saddles him with the unexpected responsibility of raising Joe's only son Patrick (Lucas Hedges, Redford from "Moonrise Kingdom"). Patrick's mother Elise (Gretchen Mol, also introduced in flashbacks) is a drug addict who's been out of the family picture for a long time. Lee despises her and is annoyed to learn that Patrick talks to her regularly and holds no grudge against her.