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
Boston Strangler Plot Summary and Synopsis
A crime thriller based on the true story of the notorious serial killer who terrorized Boston in the 1960s and the detective who hunted him down.
Source: Wikipedia (CC BY-SA 3.0).