[REC] (2007)

A television reporter and cameraman follow emergency workers into a dark apartment building and are quickly locked inside with something terrifying. The residents of the building become infected with a virulent and contagious disease that turns them into bloodthirsty savages. As the reporter and cameraman fight for their lives, they discover the connection between the outbreak and demonic possession. In their quest to survive, they uncover the horrifying truth and are ultimately dragged into the darkness.