Merthur!au : After a heavy blow to the head, Merlin finally regains consciousness. But it turns out Merlin has forgotten everything about his life at Camelot. Arthur tries his best to help him remember : he tells him how they met, where they stand now, and everything in-between. As it doesn’t work, Arthur suggests Merlin should resume to his usual chores, that maybe the routine will ring a bell. But as time goes by, Merlin still can’t remember anything and Arthur starts to think he’s lost him forever. However, and as always, it is when you expect it the least that the sun comes out….