When you're twenty-one years old, you don't expect your closest friend to be in her nineties, but Eloise and I have more in common than I ever would have guessed. We first met through a home-share program that matches students like me with seniors like her. That was three years ago. We've been inseparable ever since. The problem is that odd things have been happening, lately. I'm hearing voices in the basement. I feel like I'm being watched by unseen...