This novelization of the Doctor Who adventure Battlefield depicts an interdimensional conflict where Arthurian legend and modern military technology collide. The narrative follows the Seventh Doctor and his companion Ace as they encounter UNIT forces, led by Brigadier Winifred Bambera, who are struggling to protect a nuclear convoy amidst supernatural storms. These events are orchestrated by the sorceress Morgaine, who arrives from another dimension to reclaim the sword Excalibur and confront the Doctor, whom she recognizes as the wizard Merlin. The story features the return of the retired Brigadier Lethbridge-Stewart, who joins the fray to assist his old friend against the demonic Destroyer. Ultimately, the Doctor must use both scientific logic and ancient myth to prevent a catastrophic battle and secure a peaceful resolution between the two worlds. These excerpts showcase a blend of science fiction and high fantasy, emphasizing the Doctor's complex role as a timeless figure across different realities.