River Heights has gone gaga over Make-a-Pets! Nancy and her friends are excited to make their own cuddly stuffed animals--and play the online game Petopia that goes along with Make-a-Pet animals.

But when Nancy's friend, Violet, discovers that Hoppity, her Make-a-Pet, is missing, the Clue Crew is called on to help find the missing bunny. It seems there are a few possible suspects--including Violet's best friend, Sonia, who claims Violet stole the idea about Hoppity from her. Could Violet's best friend be the culprit? Or is the real thief even more of a surprise?