An old acquaintance of one of the Mistakes has come to pay them a visit. They've picked an awfully nice dimension to live in, haven't they? It'd be a shame if anything strange and horrific were to happen to it...
[self-explanatory, probably to be filled in AFTER the arc completes unless you want to give an outline of what's supposed to happen]
Major Players Edit
[Who are the most influential/important characters in this arc? Who has the most stake in it?]