HALLOWEEN – Elm Street in this North Texas city is a nightmare. There’s a phone booth covered in a neon green ooze. When you pick up the receiver, you hear a cryptic message. A sandworm bursts out of a local business’ patio. A cemetery with rows of tombstones is too close for comfort. The courthouse is lit up in a purple light like a haunted castle. If you walk around on the right night, you might see people carrying machines that beep as they search for roaming spirits while others work to end a witch’s reign.