It's very possible that I missed certain nuance throughout this film that further expanded the actual story...but it just was not good and did not make sense. It is shot well, but the acting is subpar, the characters are not properly explained, the dialogue is clunky, and it uses an audio overlay instead of live audio...so you see their lips moving but it's clear you're hearing something different.
The plot is some guy testing a water source and interacting with hallucinations that aren't hallucinations? It's not explained. It's just people walking around with paper bags on their heads and the main character losing his mind but nothing is explained at all. They attempt an explanation between the main character and his University lead and it is just word salad with a doom dressing.
It's just not a good story line ultimately, and that's it's entire issue. It had the budget and film crew to do something really creative, the story could have been really interesting, but the director chose to be vague when it came to the plot so you simply don't care what happens by the end because you're so bored or confused.