After she survived the end of the world, Charity Michaels decides that she needs a new career track. Leaving the world of secret black op missions behind she moves to Leeds to join a small group of undead beings. They protect the peaceful dead from the encroaching human world, and as cover for this Charity takes on a job as a history teacher at the local school. Things seem to be going well, until Leona and her apprentice Letha turn up, bringing chaos and problems with them.