It's 1960s Glasgow and terror has a new name. After the discovery of a woman's body, fear begins to grip the city. As more evidence of the killer's handiwork is discovered, the police and detectives realise they are dealing with a serial killer. Ruth is a young psychologist obsessed with crime. For her, the hunt for the killer becomes a personal one. She trawls his hunting grounds and meets the people affected by his brutal crimes, determined to track him down. But who will have the last word?