Open the book of the Clow Cards -
Clow is the book within which the Clow Cards
are placed. Clow Cards are magical cards created
by a sorceror, Clow Reed, who had super "powers."
For example, the card of fire would have the
magic of fire, the card of wind would have the
magic of wind, and so on. Each card has its own
life and does whatever it wants. Because they
have strong "powers", normal things
cannot win against them. Therefore, Clow Reed put
the cards into a book called The Clow, and placed
the Beast of the Seal, Cerberus (or Kerberos), on
the cover to prevent the cards from turning bad.
The book is locked by the Key of the Seal.
As you unlock it and open the book, you can find
a hole where the Clow Cards are put. In any case,
Cerberus (Kerberos) fell asleep. Sakura found the
book in the basement of her house, and
accidentally scattered the cards away. She must
capture the Clow Cards back to prevent the
happening of a disaster! Note that in the 2nd (latest)
storyline of the manga, each Clow Card will
eventually transform into a Sakura Card -- how?
why? You'll find out in the manga.