There have been several movies about dementia over the last decade or so, but none which do such an effective job of immersing the audience in the experience of the person suffering memory confusion. The Rashomon technique - retelling scenes from different perspectives and different realities - is especially effective. It uses the narrative conceit of the "unreliable narrator" to good effect. The overall impact when reading the script is to share in the Protagonist's (Anthony) sense of discombobulation. Names change, time changes, locations change. Anthony connects conversations from different times as if they're happening in the here and now. It's as if Anthony is constantly at sixes and sevens with his present reality... and the way this is conveyed in the script invites us into that experience of confusion as to what's going on.

In terms of the plot, the central question is about Anne getting Anthony out of her place and into some sort of care facility. Thus:

Beginning: Broaching the subject

Middle: Working through the issue

Ending: Anthony discovers he's in the care facility and Anne is living in Paris

Of course, the playing out of this narrative is jumbled by Anthony's experience of it, largely a state of denial until at the very end, he finally realizes Anne is gone ... he's not in his flat ... his daughter Lucy is actually dead ... so that he becomes like a child again, asking for his "mummy."

It's a gut-wrenching ending. The endpoint for a man who presumably was a quite capable engineer, reduced to experiencing the world as an infant.