In a version of Hawkins where the danger no longer comes from another dimension, a new kind of killer begins stalking the town—one that hides behind a mask instead of the Upside Down. As boys start turning up dead, y/n tries to ignore the unsettling connections tying them back to her, brushing it off as coincidence. But when the calls begin and the killer’s attention shifts directly to her, it becomes clear she’s at the center of something far more personal than she ever imagined. With fear closing in and trust becoming a dangerous gamble, y/n is forced into a deadly game where the line between safe and unsafe begins to blur—and the person behind the mask might be closer than she thinks.