In the ruins of a castle, Nimue and Merlin finally meet face to face, and more secrets from the past come screaming to the surface.

While Nimue, Morgana and Kaze seek refuge in an ancient web of tunnels, Arthur and Gawain fend off a siege led by the Weeping Monk.

With Red Paladins closing in on the Fey hideout, Nimue hatches a bold plan to buy time and secure an escape for her people.

Nimue weighs a fateful decision, Uther takes a defiant step, and Gawain discovers not all is what it seems within the Red Paladin camp.

With the future of the Fey hanging in the balance and enemies closing in from all sides, Nimue sets in motion the final pieces of her plan.