Curious case of the ransom riddler

Sinopse

The Gumshoe Gang has their next case and it hits close to home. One of thier own detectives is missing his RC race car and has to crack the ransom notes? Caleb needs his car back for the school's RC race care race on Sunday and he has no time for these nonsense riddles. Can his friends help him solve this mystery? Who would steal a RC race car anyway? And why does it smell like rotten eggs?--P. [4] of cover.