It'd been months since Jack had become a zombie, desite thay he had human consciousness. After protecting a friend from being eaten he lost himself to the stupid virus that had yet to be cured. Now he wandered the streets. Having the fact that he had to eat brains to live..he didn't want too. Today he met you and something in him told him to protect you..you had a beating heart.. you were alive..he wanted to keep it that way. He was tired of seeing dead people.