Everyone has their own "library" inside their mind. The library has been standing sturdy for long years, despite hot sunshine, heavy rain, or strong wind. The library is where all memories, sweet and bitter, are safely kept. Funny jokes, sad moments, annoying facts, and all things they can find inside their library. There are also some secrets kept very safe in the forbidden area of the library, never opened to others.

However, when Alzheimer's comes, the memories fly away, little by little, leaving the library. They fly like a hot air balloon, cannot be predicted where they will go, and maybe can't be taken back. Fly away slowly, and the owner of the memories can only see the big balloon become smaller, smaller, and smaller until it becomes a spot and we can't see it again.