"A tortuous tale of murder and madness . . . a psychological thriller offering insight into love, friendship, and mental illness."— Kirkus Reviews When a mangled car is pulled from the river, containing bloodstains and a gun, the sense of safety is shattered in Tessa's Californian hometown. Tessa, who works at the river conservancy, thinks she saw a girl out on the riverbank—but Tessa's memory is failing and could this be the start of something more serious? Tessa's friend and co-worker, Claire Barrett, is worried—about the car and the gun, but also about Tessa. With Tessa's attorney husband preoccupied with a big case and in denial about his wife's memory issues, Claire knows that it'll be up to her to work out what's going on. When a body turns up and she discovers the identity of the gun's owner—someone disturbingly close to home—Claire is determined to uncover the truth . . . whatever it takes. "This poignant standalone from Hill ( Last Words) is as much a story about friendship and loss as it is a mystery . . . A link between Tessa and the murder mystery gradually emerges as this emotionally involving novel builds to a surprising, heart-wrenching climax. Hill's balanced treatment of environmental issues will resonate with many readers."— Publishers Weekly "A haunting psychological thriller."— Booklist