I am going to say on a whim that this is not horror but more thriller. There is some horror elements but it's not pure horror. You've got several group of people who get some cheap vacations to a paradise. After arriving they go to a reclusive beach - one of those postcards beach
But then stuff starts happening- at first it's a dead body, then it's a old woman who dies and afterwards the children start becoming adults. It seems every 30m it's 6 month sin real life or so.
There is some mystery, thriller elements then happening and all hell break lose. The childre are old enough and start fucking having a child who dies at childbirth. By that time they already know that time is gonig so fast (not knowing why).
Then most people start dying, either by mental problems or old age. Our main protagonits who were 6 and 12 when they entered are now in their 40/50's when they live the beach (due to a message written by a child)
Then comes the realization of what's happening - being a M Night Shyamalan we know that something is going to happen (if you watch the village per example) and now we learn that the hotel is a front for a pharmacentical company who wants to test their products - therefore they give the medication, send people to island and see the evolution of people - very fast to be honest.
sincerely I enjoyed the movie but it's not his best. It's quite anti-climatic and I believe it's the bad part of Mr Shyamalan (the endings)
So, the characters - well I hated Guy. I hated Prisca (she didn't speak english that well, they should explain that but okay), Rufus was just strange, Chrystal - to be quite honest all fot hem were bad characters - boring and cliches of characters you see in all movies.
Thomasin McKenzie is probably one exception...
Stuff was never really developed. Why the children grow up and their mentality equalled the speed of their physical development? Very strange. So what happened to the beach? They are going to close it and that's it? I don't know... Some bad explanations.. But entertaining.
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