It's the moment in a love relationship that contains all the rest. It's a bud of pure potential now blossoming into story.
And ultimately, the story that unfolds will be a tragedy--as all love stories are.
Anna meets Greg, Anna loses Greg. Anna grieves and makes her peace. All in a film of visual power and knowing symbolism.
At this point it's tempting to say 'enjoy.' But this is not the cinematic neighbourhood where the word applies, quite. I have no idea whether or not you will 'enjoy' this film. It's unlikely that its creator cares. You can count, though, on being moved.