Episode 1
What begins as a routine call to a house fire becomes the biggest murder investigation in Welsh history.
Episode 2
The police must figure out how to investigate not one, but three of their own when it emerges the prime suspect is a police officer.
Episode 3
A new suspect emerges and with his chequered past, the police are convinced they've got their man. But the community isn't so sure.
Episode 4
Builder David Morris is convicted of the murders. After he's spent 20 years behind bars, a new witness comes forward, sparking a case review.
