For weeks, Mara Collins thought she was imagining it.
Every evening as she pulled into her driveway, she would glance up at the small attic window and notice a faint glow behind the glass. She hadn’t been in the attic in months, and she was certain she always kept the light switched off. Yet there it was again and again, shining softly through the dusty pane.
She replaced the bulbs in the house, checked the wiring, and even asked neighbors if they’d seen anything strange. No one had. But the light kept coming on, and Mara began to wonder whether there was something wrong with the electrical system.
They chalked it up to old-house quirks until one evening, as they were folding laundry, the floorboards gave off a faint but unmistakable knocking sound.