Need help finding the name of this one film?

[DaidenDoc]

Hi.
At the start of the year I watched an Asian movie. I believe it to be Korean, but I’m not 100% sure.

The only scene that I can remember from it, was one where a woman in her 20s (dark hair, wearing a grey hoodie and white sneakers), gets put into a quicksand trap. The thing is that she’s inside her house, and the floor she’s standing on turns into quicksand (magically). I believe someone rescues her, but there was a lot of CGI involved.

Does anyone know what this might be?

[DaidenDoc]

Anyone?