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Merlin and Arthur spend one night together, but Arthur skips out on his duties and Camelot becomes overrun by Morgause’s soldiers. They lose the Keep, and are forced to flee. This is the story of how they survive the winter, and try to find each other again in the wreckage of their destiny.
(Slight canonverse!AU--set during S2. Morgana has discovered her powers but not turned evil, and has met Morgause but not joined league with her.)