1x21 - Cardcaptor Sakura: Clear Card

After Sakura recovers, her great-grandfather gives her a key originated from England, that according to him, was one of Nadeshiko's most prized possessions. Meanwhile, Kero and Yue are informed by Eriol that he discovered with help from Syaoran's mother that Kaito was expelled from the society of magicians he once belonged to after being held responsible for the disappearance of a mysterious relic with strong magical powers, and somehow it must be a key element in his plan.