There are so many strands that make up the story, and very little to connect them together. But it is well worth watching a second (or more) time just to get the whole picture (!)
Charlotte Rampling is so good, so convincing as the middle-aged woman, now separated and living with a daughter and grandchild. But there is a past incident, very important to what else is happening, briefly referred to a couple of times that isn't really explained - perhaps a tragedy involving another child?
Every now and then, there is a flashback with Anna now wearing a bright red dress. That's a signal to us to change our focus and concentrate and try to join the scenes together.
Gabriel Byrne is the cop who becomes attracted (no surprise there!) to Anna. A very good performance.