The reader is asked to help Nate the Great solve the mystery of his friend Annie's missing dog Fang.

When she cannot find her favorite stuffed toy, a young girl asks her mother, father, and older sister for help.

When second-grader Eugene's favorite comic book goes missing, he blames his best friend Charlie even though he has no evidence.

Nate always depends on his dog Sludge to help him solve all his cases, but Sludge is missing and Nate must rely on his own skills to find him.

As Nate the Great sets to work on his first international case, he searches for a lost "something" and saves the King of Sweden from a troublesome traveler.

When her best toy mysteriously disappears, Olivia the feisty pig is determined to find out who is responsible.

When Vidia, a disagreeable fairy, finds herself accused of stealing the Queen's tiara, she enlists the aid of a fellow sprite to help investigate and the two race against time to clear Vidia's name.

On a trip up the hill with her mother to feed the sheep, a young girl loses her teddy bear when it starts to snow.

Sam helps a horse which she at first considers a wild mustang, but later she begins to suspect that it might have an owner.

Bradley, Brian, Nate, and Lucy enter Polly the pony and Pal the dog in a July 4th pet costume contest, but when Independence Day arrives the animals are nowhere to be found.