Sakura and the Wonderful Teacher

On the way home from school, a mysterious woman saves Sakura from falling onto the ground. The next day, that woman turns out to be Sakura's substitute math teacher, named Ms. Mizuki. Shaoran senses a strong power from her and is immediately suspicious of her. After school, Sakura and Tomoyo decide to stop at the Tsukimine Shrine to buy a charm that will apparently help with love. Meiling and Shaoran are also there. On their way out, Sakura and Shaoran sense something strange and all of a sudden the Maze Card appears and traps them all within the maze. Now they must get out of the maze so they can seal the card. However, any trick they try, including using the Sword Card to cut the walls and trying to fly over the maze doesn't work. How will they get out? And why does Ms. Mizuki seem to have a connection to the Clow Cards?