From the moment she receives a mysterious letter about a substantial inheritance, "Hal" knows the solicitor must have her confused with a different Harriet Westaway. But she's in a bit of a desperate spot financially, so she finds herself at Mrs. Westaway's funeral, playing the part of a long-lost grandchild. As she discovers more about this affluent family and their twisted history, fears about getting caught in her deceit pale in comparison to the looming dread each revelation portends.