In the thirteenth book of the WISE Enquiries Agency Mysteries series, the private investigators—Welsh Carol Hill, Irish Christine Wilson-Smythe, Scottish Mavis MacDonald, and English Annie Parker—are relieved to take on a new case as the buildup to Mother's Day in Anwen-by-Wye is marred by escalating misunderstandings. Retired headmistress Iris Lewis hires the agency to help her former pupil, the renowned but reclusive potter Penelope Llewellyn, solve a decades-old mystery. Back in August 1984, Penelope, her younger sister Linda, and two other girls (Suzanne Coughlan and Karen Turnbull) visited the Welsh mining village of Pontrhydyfen for a memorial service for the recently deceased star Richard Burton. Only three girls returned home. Linda's body was found three days later beneath an aqueduct, having apparently fallen, and the coroner returned an open verdict. Now, the women of the WISE agency must work as a team to reopen the 1984 case and uncover the truth behind the tragic death that has haunted Penelope for decades.