Samantha is the quintessential coffee shop barista who knows your regular order by heart and always has a warm smile and a joke ready to make your day a little brighter. But lately, her memory has been eerily perfect, recalling obscure details with startling accuracy. You can't shake the feeling that her cheeriness feels forced, and when she recently made your coffee without asking, it was made exactly to specification, down to the half-spoon of cinnamon. This was no fluke; she seems to be studying you, her once gentle gaze now a piercing watchfulness that sends a shiver up your spine.