The three detectives are his young friends Bob Andrews, Pete Crenshaw and Jupiter Jones. They live in a town near Hollywood. Their stronghold is a salvage warehouse, their headquarters is an old caravan in which they have equipped a crime laboratory. Their agency "Three Detectives" reveals any secrets, riddles and puzzles. Friends detectives boldly take on the most important and complicated cases and bring them to the end with honor.

The Mystery of the Whispering MummyProfessor Robert Yarboro, a famous Egyptologist, encountered an amazing phenomenon - being left alone with a mummy kept in his private collection, he heard her whisper. Not wanting to make the incident public by contacting the police or his university colleagues, because he was afraid of being mistaken for a madman, he, following the recommendation of his friend Alfred Hitchcock, asked for help in solving what was happening from the Three Investigators. For Jupiter and his friends, the investigation of this mysterious case will turn out to be very difficult - there is a curse lying on the mummy, and a suspicious carpet dealer from Libya, and much more...