"A couple encounter a lost old woman who makes them question their sanity."

Sundowning

A couple living in an apartment together have a very unsettling and absurd evening when an elderly woman stricken with dementia knocks on their door, clearly unaware of where she is. After she pushes her way into their apartment, the two guide her back to hers in an attempt to help her and ease her to sleep. Amidst all of her scattered thoughts, the two get the sense that she knows them personally, though they don’t remember meeting her before tonight. It turns out that their memory might be more faulty than hers.