Season 1

Elaine Renko, androgynous and alone, makes her way through the dark, threatening streets of London... only to be attacked in her own home by a young man who stabs her repeatedly, leaving her for dead before torching the house.

Renko persuades a hungry young journalist, Will Benedetti, to post a story about the 'Hard Sun' conspiracy, instantly rendering her a target for Security Services agent, Grace Morrigan. Grace continues to hunt for the Hard Sun file.

Renko investigates evidence uncovered by DCS Roland Bell that suggests both Hicks and Butler were corrupt. A former aid worker who believes the truth about Hard Sun wants to challenge God into revealing himself by targeting victims who help others.

Hicks discovers the full extent of Renko's investigation into the Alex Butler murder. Journalist Will Benedetti istargeted by the spree killer, Thomas Blackwood, because of his personal connection to Hard Sun.

The brutal and bloody murder of a night-jogger has dire personal implications for Renko and Daniel. Only Hicks and Renko understand the significance of the man's death, but are unable to honest about what has happened.

Tired of operating on the defensive, Hicks and Renko take the fight to Grace's door. DCS Roland Bell arrests Grace and brings her into Lethe Road for questioning, but she will not remain outmanoeuvred.