Later, Sarah finally opened up. 'I keep hearing strange clicking noises at night,' she confessed, looking serious. 'Like from the smoke detectors.' I frowned, trying to picture it. 'Maybe it's just the house settling,' I suggested. She wasn't convinced, though. 'These noises are different, like tech sounds,' Sarah insisted, her unease evident. I promised to check it out, but inside, I felt a tickle of doubt creeping in.