Sakura Kinomoto was an ordinary 4th grader until the day she opened a magical book and let dozens of powerful magic cards loose on the world. Keroberos, the Guardian of the Clow Cards, informs Sakura that it is now her responsibility to find and capture the freed cards. With the help of her friend Tomoyo and a young boy with powers of his own, she must learn how to use her newly discovered magical abilities to collect each card and prevent the disaster that will befall the world if she doesn\'t.