Nancy works undercover as a stand-in on a movie set in River Heights so that she can look into the problems that are plaguing the production.

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.

While attending a fancy party hosted by Duchess Strickland, a wealthy philanthropist who owns a priceless art collection, teenaged Nancy Drew finds a new mystery to investigate when the goddess statue disappears.

Nancy and her friends watch the principal dig up the school's time capsule, buried over thirty years ago, but when an important vintage doll is discovered missing from the capsule, the Clue Crew is called in to investigate.

When the class float is sabotaged before the Earth Day parade, it is up to eight-year-old Nancy Drew and the members of her detective club to find out who did it.