This movie came out recently and the plot in its most basic form is like this: A team of amateur paranormal investigators decides to investigate a haunted asylum. They are recording everything as their priority is not the paranormal activity itself, but a TV show they run called Grave Encounters. Being completly devoted to their show, they agree to lock themselves inside the abandoned asylum overnight to capture ghostly activities. However, they get more than what they bargained for when the building turns into an impossible maze where the previous mental-patients come back to terrorize them.
Now, first off; I will be writing my personal opinion which may include spoilers.