At a acertain point, he senses that she's not really there. That's the moment when they decide to separate. And from then on, she wants to win him back. It's precisely at that moment that she falls in love with him.
I start expecting an adventure, I end up with tears in my eyes. One lost his life twice and kept his faith in life. Stunning performance. The music is very effective as it is used so scarcely. It's a movie to be treasured.