Keep the door closed...
An intelligent 15-year-old high school student is unexpectedly transferred to a boarding school where he opens a portal of monsters from another dimension.
TMDB audience score
Based on 110 votes
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Availability in the UK
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UK only · Refreshed 11 Oct 2026.
MyCinema quick facts
Worked out from the film's TMDB record and its United Kingdom provider listings. These are facts about the data, not a review.
Short watch · 1h 20m
At 1h 20m it runs under 90 minutes.
More horror under 90 minutesAnimation · Adventure · Science Fiction · Fantasy · Horror
TMDB files it under animation, adventure, science fiction, fantasy, and horror.
2 subscriptions · 4 free · 5 to rent · 5 to buy
Included with 2 subscription services: Amazon Prime Video and Amazon Prime Video with Ads. Free or ad-supported on Amazon Prime Video Free with Ads, Plex, YouTube Free, and 1 more. Listed to rent from 5 stores. Listed to buy from 5 stores.
6.0 / 10 on TMDB
TMDB users rate it 6.0 out of 10 across 110 votes, a positive audience score. That is a moderate sample of voters.
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