There are many stories about Moonlight Sonata ...
Some people told us Beethoven was very depressed because a German Prince, who was his sponsor and friend, had died recently and he went to an inn to drown his sorrows. When he walked there, suddenly he heard a beautiful melody whose notes came from a humble house. He came in and saw a pretty girl who played the piano. She knew the compositions of Beethoven and played them perfectly on her piano even tho' she is blind. Beethoven was astonished at the great talent of this girl and he decided to talk with her. After sometime, Beethoven told her about his sorrows, his grievances, his sadness - he even told her he was thinking of committing suicide.
The girl replied to him, You want to die and I would give my whole life to see the beautiful moonlight. These words got Beethoven excited and he began weeping, he was ashamed of himself. After that he decided to compose the most beautiful melody of his musical career Moonlight Sonata.

Other story told us Beethoven met a beautiful lady, Giulietta Guicciardi, whose father was  counselor from government of Treste. This was a supposed love interest of Beethoven on his own pupil. It is reported that her father opposed to a romantic relationship between the two and the relationship was ended immediately. He fell madly in love with her. He composed Moonlight Sonata as a declaration of his love but unfortunately she rejected him and Beethoven felt very sad with his heart broken in pieces. Guicciardi later married someone else, and there are rumors that after she separated from her husband she tried to renew a relationship with Beethoven but he rejected her.

The sonata consists of three movements:

[Moonlight Sonata 1st movement | Piano Sonata No. 14 in C# minor, Adagio sostenuto (6:00)]
Description :
Adagio sostenuto >> a powerful impression movement
Quotes:
"Is one of those poems that human language does not know how to qualify."
"A nocturnal scene, in which a mournful ghostly voice sounds from the distance."

[Moonlight Sonata 2nd movement | Piano Sonata No. 14 in C# major, Allegretto (2:12)]
Description :
Allegretto >> the movement's cheerful disposition
Quotes:
"A flower between two chasms."

[Moonlight Sonata 3rd movement | Piano Sonata No. 14 C# minor, Presto agitato (6:50)]
Description :
Presto agitato >> the sense of a very powerful sound in spite of the predominance of piano markings throughout
Quotes:
"It is the most unbridled in its representation of emotion. Even today, two hundred years later, its ferocity is astonishing."

**en.wikipedia.org

The whole complete movements of Moonlight Sonata

But this is my fav. version! :D
Umm, I'll just close my eyes for this vid. and trying not to look at the guy who play it. Well, a guy with beard who can play classic guitar with bonus that he love reading and arts, and if he could write me such romantic songs or poems - he will be count ... :P
Hmm, better don't ask me why I'd prefer to close my eyes 'coz he could be only 'Santa' that will bring my joyful cheers (that's what I call xmas spirit!!!) - LooL
Never mind those silly words, I am surely will just thinking 'my one' who got all of those what I demands - Err, a guy in my dreams? Caprice! (^.~)
Anyway, just don't bother ... I got one for my own in my mind! hehehe