Harriett (Hal) Westaway is at the end of her rope, emotionally and financially. At 21, she is mourning the sudden and violent death of her mother and trying to make ends meet as a tarot card reader. She borrowed money from the wrong person and is now receiving threats. She is skeptical when she opens a letter from a law office, but it turns out to be a request for her presence at the reading of the will of her grandmother, Hester Westaway. There is a slight problem: Hal's grandmother was Marion and she died before Hal was even born. She couldn't help speculating. This could be the ticket out of her current mess, if she could get away with it and IF her conscience would let her get away with it. A few thousand pounds could get her back on her feet and the loan sharks off her back. Surely, a wealthy family wouldn't miss that amount of money.
When she arrives at the rundown estate and meets her "family," she begins to wonder if the money is worth the risk. She finds herself enjoying being part of a family, but this family has a tragic history and a few secrets hidden away where no one was supposed to find them. Hal finds herself uncovering secrets that involve her more than she could have imagined. This suspenseful plot and intriguing characters will keep readers spellbound until the very last page of Ruth Ware's The Death of Mrs. Westaway (2018).