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

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

While attending obedience class with his new humans, Buddy the dog helps solve a mystery involving two Pomeranians that were switched at the dog park.

When therapy dog Buddy attends the fourth grade sleepover in the school's library, he solves the mystery of the school ghost.

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.