The premise of this movie is Dr. Horrible meets zombies. It’s called Rigamortis: A Zombie Love Story.
Rigamortis takes place shortly after humanity has put down a recent zombie outbreak. The last two zombies left “undead” are looking for their place in the world, while one lonely zombie hunter’s newfound fame and glory can’t fill the hole in his heart left by the recent loss of his now undead love. The characters are forced to confront zombies, angry mobs, double-barreled shotguns, and an ever-dangerous thing called love, until fate brings them all face to face in an explosive finale.