Card Captors

In CardCaptors, the main character is a 10 year old girl named Sakura.  One day she hears a noise coming from her dad's library and goes to check it out.  She finds a book and opens it.  The book holds card and when Sakura picks one of them up, a strong wind starts up and all the cards are blown away.  Then she meets Keroberos, a small stuffed animal type thing, who is the gardian of the seal of the cards, except he was sleeping when they escaped!  So now with her best friend Madison/ Tomoyo and Li she must capture all the cards back.