Lucy urgently needs help because her boyfriend has been acting very strangely for some time. She senses that he is hiding something from her, but she just can't get anything out of him. He is as closed off as a living safe! The three ???, consisting of Justus Jonas, Peter Shaw, and Bob Andrews, are doing their best. They observe Lucy's boyfriend and secretly begin their detective work. Does his behavior have anything to do with an accident? Has he lost his memory, or is it about money or fraud? The detectives are investigating in all directions. Another exciting case with many challenges for the detectives from Rocky Beach.