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.