The story itself, of AC is beautiful. Cept, if you miss one second of it, you will be basically lost in all the minor details. The end is, wtf? And all the lore and symbols are so silly and make you go wtf even more.
Than again, don't take my word for it, I hated this game, I thought the gameplay was repetitive, if you liked the first one, you'll like the second one. As the above poster said, you don't need to play the first one, but if your getting the second one, might as well get the first one.