Cardcaptor Sakura takes place in the fictional Japanese city of Tomoeda, which is somewhere near Tokyo. Ten-year-old Sakura Kinomoto accidentally releases a set of magical cards known as Clow Cards from a book in her basement created and named after the sorcerer Clow Reed. Each card has its own unique ability and can assume an alternate form when activated. The guardian of the cards, Cerberus, emerges from the book and chooses Sakura to retrieve the missing cards. As she finds each card, she battles its magical personification and defeats it by sealing it away. Cerberus acts as her guide, while her best friend and second cousin, Tomoyo Daidouji films her exploits and provides her with battle costumes. Sakura's older brother Toya Kinomoto watches over her, while pretending that he is unaware of what is going on.