After a terrible accident, Merlin is left with no memory of his time in Camelot. Separated from Arthur and all who could tell him who he is, Merlin tries to piece together his life and his loyalties. But loyalties can be influenced; lives can take very different paths to the ones they were destined for. And a lost sorcerer is a very powerful and useful weapon to have.

On waking with no memory of the previous night, Merlin finds himself accused of Arthur's attempted murder. With all evidence pointing to him and no way to disprove it, Merlin must face the possibility that he is now a threat to the Once and Future King.

Unable to match Merlin's power, Morgana tries to take her revenge by killing Arthur and Merlin as children. But when her plan goes awry, King and Warlock must find a way of correcting time before their past, and present, disappear altogether.

And so she followed him; heading for the TARDIS and the ice storm and the ghost of a London shop girl who, a year from now, would start to live the life with the Doctor that Martha had always wished for. Martha, 10/Rose