Justus Jonas is very happy when he learns that he has been nominated to take part in the famous quiz show "Who cracks the nut?". But the show turns out not to be what he expected. The show master Nick Nobel's daughter gets kidnapped and the kidnappers force Nobel to ask Justus weird questions in the show if he wants his daughter back. But what are the kidnappers really after?
Will the Three Investigators be able to solve the riddles and rescue Nobel's daughter? And what is happening in the mist of the cliffs...?