Cerberus, or Keros, the guardian of the cards, tasks Sakura with the job of finding the missing cards, revealing she has magical potential.
Cardcaptor Sakura, originally localized as Cardcaptors in the North American release, starts off when Sakura Kinomoto accidentally frees powerful cards called the Clow Cards from a book. Cerberus, or Keros, the guardian of the cards, tasks Sakura with the job of finding the missing cards, revealing she has magical potential.