I should have known this would be miserable. And it was. The clue was
the pretentious missing E but I actress was kind of hot
and...well...I'm an idiot.
Jill and Adam live in the stereotypical "art space" that their parents probably pay for. They have a lot of sex and talk about "art". That's the extent of their relationship and about the only part of the movie that works. Adam finds an abandoned hospital and shows it to Jill. OOH! They can use it an an ART SPACE!. If you can get past the ridiculousness of this you have more tolerance than I.
They wander around making plans. Jill, in a clue to how much thought she put into her art, says she can just sign the garbage lying around and that's art. They find a room with a strap-down table. Adam straps Jill down and leaves her there for...well, we don't know how long, and she's assaulted by some spirit. Adam come back. They have sex until Jill's nose literally bleeds. Good job, Adam! They get freaked out, leave the building and...ruh-roh! - her car's getting towed away! Of all the BAD LUCK. They call for a ride from a friend who shows up with her dickish boyfriend.
And decide to go back in the building because it worked out so well the first time.
An hour later, the movie ends.
If you like movies where the characters actively work against their own self- interests simply because of the script and lack any kind of logic at all (the water, power and video equipment in hospital all still work) then you'll love this. If, however, you need even a hint of reality to your suspense, don't waste your time.