The English town of Lafferton is ravaged by flash floods. A shallow grave is exposed; the remains of missing teenager Harriet Lowther have been uncovered. Harriet was the daughter of a prominent local businessman, and her death 20 years before had led to her mother’s suicide. Cold cases are always tough, and in this mystery in the enduringly popular series, Chief Superintendent Simon Serrailler must confront his most grisly, dangerous, and complex case yet.