Created by an English-Chinese Sorcerer, Clow Reed, the Clow Cards were sealed into the Clow Book upon his death closely and guarded by Cerberus, the Beast of the Seal. Because the cards had been released, Sakura must find and seal each and every card before catastrophe befalls the world.
She's just one of the cutest cosplayers I've ever seen. If anyone knows who this cosplayer is, please do leave me a comment. Wonderful job!