It's a Korean miniseries from last year. Apparently highly rated, though I've seen only a few clips. Here's the trailer:
https://youtu.be/lJ3_1v8sB48
About a woman who committed a crime so foul, she's doomed to run a hotel full of ghosts until she finds someone guilty of a worse crime. Problem is, she can't remember what she did. She's now been there over a thousand years. Or something. Looks interesting, though.
https://youtu.be/C5RqxbKLb_U
I think it's available through the viki network, though I haven't investigated it yet.