Everyone designs Doctor Who stuff in their spare time, right?
So, these are the Graves. The Graves just appear one day, all over the place, and asides from a few people wigging out about there being a tonne of gravestones everywhere they’re not that big of a deal and you pretty much just get along fine with it until five o’clock. Why five o’clock? Well, nobody is sure why, but at five o’clock the shadows change. The shadows they cast are not the odd blocky geometric shapes they ought to be, but are of people. Peculiarly different people, in fact, so unique and believable that you wouldn’t be so very surprised if you just happened across one that was… yours.
Oh, and the Graves watch you.
When you aren’t looking, naturally. Wouldn’t want to be impolite.