Police discover that Fred West was known for abusing girls in Glasgow and was run out of town, followed by wife Rena and missing friend Anne McFall.

In 1994, Fred West is exposed as a serial killer. Police start to trace his early crimes in Glasgow, such as the disappearance of his first wife.

As two more bodies are found, the search moves to the first home of Fred West and new wife Rosemary, where they lived with Rena's daughter Charmaine.