Plot Synopsis:
18 months on from the devastating conclusion of The Tunnel: The Complete First Season, the newly promoted Commander Wassermann and the grieving DCI Roebuck have been leading separate lives until two seemingly isolated events bring them back together: a plane crash in the English Channel, killing everyone on board, and a couple abducted from The Tunnel, leaving behind their traumatised child.
On the surface the two cases appear to be unconnected. But as the ensuing investigation moves between the coasts of Kent and northern France, it reveals the murderous crusade of a terrorist cell. As Wassermann and Roebuck pick their way through the clues thrown up by a vast field of debris, forging connections as they go, they are confronted with sinister and complicated forces at play. In a terrifying game of brinksmanship, they risk everything in the pursuit of true justice.