A famous Hollywood actor asks the Three ??? for their help: His father died and in order to inherit his castle and all his fortune he has to solve a tricky riddle. Just the right job for the three detectives! They start their journey into the Realm of Riddles but they only have 24 hours left ...

In Rocky Beach, California, live the three detectives: Justus Jonas, Peter Shaw and Bob Andrews. Together, they are The Three ??? and there is nothing they don't take on!
The three friends witness exciting detective stories, solve puzzles no matter how tricky, and can always rely on each other.