Margaret Winterbottom, 89, has lived on Garnon Crescent her entire life--except for a few years she never talks about. She knows all the neighbors: their lives, their hopes, their heartbreaks. Only recently, Margaret's memory isn't what it used to be. She's sure Barbara, her best friend and neighbor, told her something very important . . . but what?
​When Barbara is found dead in an apparent homicide, Margaret is determined to recover the missing memory. Margaret and her grandson, James, begin investigating, but soon strange things begin happening in her home--objects moving and cropping up in odd places, the television turning on by itself. Some believe her memory is worsening, but Margaret knows somebody wants her out of the way because she holds the key to solving the case--if only she could recall where she put it . . .