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 Burning Footprints The local eccentric Potter disappears, and three detectives join his search. Arriving at the relatives of the missing person, the guys witness the appearance of fingerprints consisting of flames.

The book contains illustrations.