

As anarchy explodes on the streets and the nation is rocked with night upon night of rioting, Fraser and his team reach the endgame in their mission to get the lights switched back on in the Red Zone. Meanwhile, with his personal life imploding, Sutherland is forced to fight for his political life as Archie finally fires his first shots…
As the possibility of a solar storm affecting the UK mounts, the Prime Minister Robert Sutherland, his chief of Staff Anna Marshall, the Head of the Civil Contingencies Secretariat Fraser Walker and the Home Secretary Archie Glover-Morgan assemble the emergency committee “COBRA” in an effort to combat the situation.
With the nation in the full grip of the crisis and experiencing the worst blackout in the history of the UK, Sutherland and his team are forced to work around the clock to restore power. Meanwhile Anna reconnects with Edin, but this dalliance with her past love becomes more dangerous than she anticipates.