Don't ring the bell.
A group of friends travel to a secluded campsite to film a documentary. What they find is something much more sinister than they could have ever imagined.
TMDB audience score
Based on 26 votes
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Availability
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United States listings · Refreshed 19 Oct 2026. More horror to watch in the US
MyCinema quick facts
Worked out from the film's TMDB record and its United States provider listings. These are facts about the data, not a review.
Standard length · 1h 32m
At 1h 32m it sits between 90 minutes and two hours.
Horror · Action
TMDB files it under horror and action.
2 subscriptions · 5 to rent · 5 to buy
Included with 2 subscription services: Amazon Prime Video and Amazon Prime Video with Ads. Listed to rent from 5 stores. Listed to buy from 5 stores.
4.0 / 10 on TMDB
TMDB users rate it 4.0 out of 10 across 26 votes, a low audience score. That is a small sample, so the score can still move a lot.
The scare meter is MyCinema's own rating, given by a person who has watched the film. It is not a TMDB score.
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A group of five women go camping in the woods to celebrate a friend's birthday over 4/20 weekend. But when they cross the turf of an illegal marijuana grow operation they must struggle to survive the living nightmare.
Open 4/20 Massacre
