Nancy, helping out with a "chemystery" camp, a special forensics program for high school students, finds herself with a real mystery to solve when the professor who runs the camp suddenly falls into an unexplained coma.
Nancy finds herself investigating a disappearance--and mixed up with a crime lord--in India when Kalpana, a technical support operator she befriended over the phone, calls her mysteriously at three in the morning and goes missing.
Teen sleuth Nancy Drew, and her friends George and Bess, search for missing student film-makers and, in the process, discover the secret behind the local urban myth known as The Demon of River Heights.
Nancy and her friends interview Terry Smith, who takes in stray cats and kittens; but when two kittens turn up missing, the girls must discover what happened to them.
When the class hamster goes missing, Katie brings in a bunny to be the new class pet. When someone starts wrecking the Spring Fair preparations, all signs point to the bunny. Nancy is on the case, and she may solve two mysteries at once.
Nancy and Ned look for the thief of several official legal documents in order to help River Heights resident Evaline Waters keep her home when a large corporation demands her land for a new warehouse.