In the wake of the waves "You have to take the case for me! Find Finnley! He's in danger!"Shortly afterwards, the seriously injured surfer loses consciousness. But who is Finnley? Justus, Peter and Bob set off on a fast-paced search all over Rocky Beach. In the course of their investigations, the three??? encounter a mysterious pursuer, are disgusted and find strange notes. But above all, Peter has to prove his surfing skills. Will the three friends manage to find Finnley in time and warn him?