This is probably a long shot and I never done a line like that but here's my idea:
He lost his wife in a car accident and he can't seem to get over her. He is dreaming about her at night and probably because he doesn't want to let her go, suddenly her ghost visits him every day. At first he thinks he's insane but it really is her. He's a scientist and usually does not believe in things like that. But he's frantically been working on a way to bring her back to life. It will work out.......but will his wife be still the same person?
I would play the wife and I am not picky at all on PBs. Please only active players!!