You see a girl(Aeris)who's looking at something it looks like some kinda dream.. she smiles but walks away.. the camera zooms out and you see Aeris's dream.
You see another girl(Rinoa) who's trapped into a woman's(Edea) power but soon after that you'll see a cheerful Rinoa who enjoys freedom. After the fether appear(in my eyes thats a symbole of peace and a message)
Then she see's a boy(Squall) she falls in love and ask for just one dance, the dance ends and she falls into the arms of Squall but she knows it will never work out..
The fether appears again and Squall catches it,he recieves the message, you see her wings growing as her fethers are falling down.. as if she cannot handle it anymore.. You'll see a sad Rinoa afterwards grasping to her rings, her memories, her heart... It ends sadly because she can never be together with him..
