A strange sickness. Something lurking outside. Those are about the only plot details that can be gleaned from the mysterious first trailer for It Comes At Night, the new horror movie from writer-director Trey Edward Shults. Instead of information, the trailer provides heavy dollops of dread, beginning as it does with the slow creep of the camera down a long hallway to an ominous door, as the music hums with danger and the dialogue sets a desperate scene. Who needs story when you have atmosphere this suffocating?