When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.

Kayla places her tooth in a Tooth Fairy pillow, but it disappears before the Tooth Fairy has a chance to visit--can her dog King help Kayla find the missing tooth?

A latest series entry by the Geisel Honor-winning team finds King and Kayla helping their friend Asia, who has discovered that her new gold ring has gone missing after a day of playing in the snow.