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.

When King's favorite blue ball goes missing, he and Kayla must put together clues to figure out where it went.

When Buddy goes to school to become a therapy dog, he ends up helping figure out who pulled the fire alarm instead.

Buddy the dog discovers a strange, blue-tongued creature in the school library, and investigates what it is and how it got there.

Buddy the dog risks everything when he leaves his new family to investigate what happened to Kayla and her father, his beloved former owners, by slipping into a van Kayla's uncle is using to empty her house in the middle of the night.

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?