"Crow, Pig, and Beaver are taking a nice stroll in the woods when they come across a red hat sitting in a puddle. Whose hat is it? What mysterious circumstances could have brought it to this very puddle?"--
When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.
Stewart's best friend and sparring partner is his pen, Craig, so when Craig disappears Stewart is lost until a letter arrives from far away with very familiar writing.