AN OLD STORY
I haven't seen this movie but the theme seems like a story I had to read in High School, I am in my 70s so that tells you how long ago this was. I am not sure but it may have been by O'Henry. It was about, as much as I remember, about a sick child confined to bed. Out side her window is a tree and she is convinced that when all the leaves fall from the tree, she will die. I think her mother ties the last leaf to the branch so it won't fall and the girl eventually gets better.
Never depend on anything and you will never be disappointed.