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"Sinister" follows a true crime author, Ellison (Ethan Hawke) who moves his family (unbeknownst to them) into a house where an entire family was hung to death in a tree in their backyard, save the youngest daughter who vanished without a trace. Upon moving in, Ellison finds a box of 8mm footage and a projector in the attic; contained in these reels of film are various murders dating from the 1960s up to present day— one of them is the filming of the hanging murder that occurred in his backyard. As he furthers investigation into the footage, he finds more then he bargained for when connections are made to an ancient deity who takes the souls of children.

How to Watch Sinister Legally and Safely

If you want to stream Sinister through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Sinister films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.