You wake suddenly. The house is silent. You frown, wondering why you're awake, then roll onto your side, trying to fall asleep again. Your bed faces the doorway, giving you a clear view of the living room. A green glow spills across the floor. You blink. Has Grandma's night light always been green? No. It's always been a soft, warm yellow. Your heartbeat quickens. You grab your phone. 4:00 a.m. You tell yourself you're just half asleep. You close your eyes and eventually drift off. By morning, you've almost convinced yourself it was a dream. The next night, it happens again. You wake without warning. 4:00 a.m. This time, you force yourself to look. The light is red. A chill crawls down your spine. You turn toward your grandmother, hoping to wake her. She is lying with her back to you. All you can see is her long white hair.