Set in 1973, this gripping series follows the investigation into the murders of three young women in Port Talbot. It delves into the groundbreaking resolution of the case nearly 30 years later, thanks to innovative DNA technology. By juxtaposing the investigative techniques of the 1970s with the forensic advancements of the early 2000s, the show explores how the town grapples with the long-lasting impact of an unsolved mystery and questions whether true justice can ever be achieved.