'If the seal is broken, disaster will befall this world!'
A girl causing mischief turns out to be a Clow Card… and it seems to be after Touya… will Sakura be able to guess the Card's essence in order to defeat it? Sakura goes to Tomoyo's house for the first time. Will she be able to help Tomoyo and Sonomi with their problem? And what does Syaoran have against the new teacher?