Sakura and her friends are at a picnic with a portable karaoke device Tomoyo got from her mother's company. It is Tomoyo's turn to sing, and she begins singing. The next day at school, Sakura and Tomoyo talk about the song that Tomoyo will sing in choir. At cheerleading practice, Sakura, Chiharu, and Naoko talk about Tomoyo's singing, and decide to go listen after practice. However, Tomoyo's voice is stolen by a Clow Card. Later that night at Sakura's house, Kero tells Sakura that the Voice card caused this. Sakura and Syaoran go to Tomoyo's house to try to seal away the Clow Card. Then, Syaoran and Sakura begin thinking of ways to capture the Voice card. After a comment by Sakura about the Song card, Syaoran comes up with the idea as using the Song card to sing with Tomoyo's voice to draw out the Voice card. It works and the Voice card comes into Tomoyo's house. Syaoran seals the exits with seals, so that the Voice card cannot escape and Sakura seals the card. Tomoyo's voice is returned to her, and she is able to sing in the choir. Sakura and her friends go to the concert and listen to the choir's singing.
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