Cool concept but terrible, terrible writing.
None of the characters behaves in a believable way, it all feels staged (you know those lines that just happen in movies but just don't feel right in real life? Like "there's no time to explain, just follow me" or "we've got company"), even at the beginning at the resort, before the supernatural part kicks in, like a series of scenes almost unrelated one to the other and patched together, each with the precise purpose to stimulate a feeling in the audience or to get the plot ahead. Characters falling as flies like in predictable horror movies.

Some unexplicable sloppy screenplay moments:

- "I'm a nurse. My name is Jarin"
- (after the seizure) "I ruined everyone's breakfast"
- "Everyone needs to have a voice here. [...] We will make destructive decisions if we don't feel safe with each other" (The whole group psychology session on the beach, really).
- "Guy, I feel better!" (after having her tumor removed)
- (baby dies): "maybe we should all talk about what just happened"
- "I stare at the remains of nameless people in glass cases, and I kept thinking I'm going to be one of those people"
- (holding those pool rubber buoy worms) "I'm using these to swim out. I have a sister, she's a therapist too. I need to get to my sister, we never talk, we had a fight a long time ago. **She's older, but now I am** ."
- (why do you keep lighting the matches on?! And just the whole scene)
- (Rust that acts like poison into the blood stream?)

The ending was the best and more naturally progressing part of the movie