Clarisse is a clever cat who loves books. She may not understand the dark, squiggly lines, but she can't get enough of the pictures. One day, she stumbles upon a magical building where people walk in empty-handed and come out with an armload of books. She has to find a way inside!

There's just one problem: NO CATS are allowed in the library! That's not going to stop clever Clarisse, though. Once she sneaks in, she stumbles upon exciting new stories and even helps a little girl practice reading aloud. But when the librarian comes looking, will Clarisse be allowed to stay?