Hello there!
Arthur wakes up out of the lake, and has to find his other half. But just upon entering the nearest town, Avalon, he sees the great Merlin Emrys (Ambrosius), the famous (actor, singer, model, etc.).
And he has to get to him.
Along the way, he meets someone (an OC or Morgana or Nimueh, someone like that), to help him achieve his destiny.
Because Merlin gave up, wiped his memories, decided "to hell with destiny" or something like that.
I'd read it, what about you?