Some children disappear. Others are erased. When eight-year-old Lukas Jensen vanishes from a crowded night market in the resort town of Hua Hin, police assume it's a tragic accident or a family dispute. But Detective Chonlatee Intarat, on holiday from Bangkok, sees something they don't-a single footprint in the mud, pointing away from the search, marked by the strange circular depression of a walking stick. Her instincts lead her to Anan Chaiyasan, her former mentor, now a broken man hiding from his own failing mind in a quiet garden. Together, they uncover a pattern the authorities missed: three other missing children-poor, migrant, invisible-whose disappearances were written off as accidents or runaways. Someone has been hunting in the shadows of paradise. Someone who doesn't see children as victims, but as flaws in need of correction . And he's watching them. He's been watching all along. Now Chon and Anan must race through the underbelly of Hua Hin-from fishing ports to temple gardens to an abandoned railway yard-to stop a killer who views murder as art, who sees their investigation as part of his composition, and who has one final, catastrophic movement planned. The symphony is almost complete. And the conductor is taking his final bow.