Sakura Avalon used to be a normal girl, until she opened a mysterious book in her father's study. Then she accidentally unleased 51 cards of varying powers and a little talking animal tells her that it is her duty to recapture them. With her best friend providing cute outfits, Sakura embarks on a journey to capture these powered cards. Soon she gains a rival to help capture them.

After capturing the cards, Sakura soon had to prove her right to own them by facing Yue. She earned that right, but she has to put the cards under her seal, or else their powers will die out.

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Opening song:

[Wind, Rain, Shadow, Wood, Sword, Thunder, Power, Sleep
Cardcaptors of the Clow,
Expect the unexpected now!]
The secrets of the Clow,
Were all a mystery,
But when this mighty book was opened,
The powers was set free,
[Cardcaptors]
A mystic adventure
[Cardcaptors]
A quest for all times.
Each card possesses the power of it's own
We got to find them to bring the power home...
[Wind, Rain, Shadow, Wood, Sword, Thunder, Power, Sleep
Cardcaptors of the Clow
Expect the unexpected now!]
[Cardcaptors!]
A mystic adventure
[Cardcaptors!]
A quest for all times
Cardcaptors, Cardcaptors!

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NOTE: this guide reflects the US dub. Understandably it was dubbed differently in other countries, but this is for U.S. reference.