At the end of the last season of TWD, Morgan moves, after the battles to the dump which Jadis abandons to join people at the kingdom. People keep visiting him, and won't leave him alone so he departs. He starts walking, at times he'll use cars that work and have gas, and other times walk mainly. Morgan has a hard time killing people, and he had vowed to a friend that he wouldn't kill anymore. When he has to kill people he goes into a kind of berserker mode and can't seem to stop. He doesn't even recognize people from his own group for awhile. He can't seem to come to terms with the killing of survivors, it haunts him much of the time.
(The gossip was that Morgan requested a move from TWD, because he didn't like the way he had stay in his hotel room at all times throughout the filming).
He encounters a guy named John, along the way, who gives him a lift for a while and they get caught up in some problems with other survivors. John and Morgan end up helping one another and another survivor Althea (Maggie Grace) rescues them in an armored vehicle. She wants their stories, which she tapes with a videocamera. And then you hear a little backstory about Morgan and John, and the things that have happened to them.
