Here's a dumb idea I'll offer up, and see who's interested:

Based on a short video someone made half my life ago, the story would center around an antique shop called "Intriguingly's", owned and operated by one "Lukewald Sludgemare". Nobody really knows him personally, or precisely when he came to town and opened up his shop, but it's there, and it's just as strange (and at times unnerving) as he is.

There is a special door, in the shop, that he warns new customers to not open (despite using the door himself). The story would begin when someone decides to disregard this instruction.