"Llama Llama has lost his first tooth. But he can't leave it under his pillow because he doesn't know where it went! Will Llama Llama ever find his missing tooth?"--Back cover.
Llama is eagerly waiting for his first tooth to fall out so he can put it under his pillow, but then he and Mama realize it fell out on its own and they must retrace their steps in order to find it.