In 1979, when Margaret Thatcher's first government breaks a promise to establish a Welsh language television channel, a wave of civil disobedience follows. One man - Gwynfor Evans - threatens to starve himself to death unless the government comes good on its manifesto pledge. The reimagining of one of the most colourful chapters in contemporary Welsh history.

Detective superintendent reopens two unsolved murder cases from the 1980s. Forensic methods link the crimes to a string of burglaries. Steve's team has to find more evidence before the perpetrator is released from prison.