When the Mystery Machine comes to life and begins driving by itself, the gang tries to find the clues.... Which leads them to The Mystery Kids, the band who formerly owned the Mystery Machine.

The gang travels to a western town where the majority of the residents are robots.

The gang is in Paris to see Daphne's cousin Dannika win "Model of the Year", but they discover she has been abducted when a Gargoyle from Notre Dame cathedral has come to life. Now the kids must find her by searching the Paris catacombs, the sewers, and the cathedral before the fashion expo starts.

In Russia, the gang discovers the Frozen Fiend, a ghoul creature that stolen the Emperor Cup, which would be give

the Internation Hockey Tourmants's winner?

The Mystery Kids head for a NASCAR-like championship race where mayhem is taking place on the racetracks.