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.

Three detectives and the mystery of the coffins There are many legends about the famous cave labyrinths in the Swabian Alb, and of course hardly at least half of them true. But Jupiter, Peter and Bob, three young detectives from Rocky Beach, California, begin to believe in ghost stories when they suddenly discover a haunted cave. And they will make a terrible discovery in it.

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