The film recounts the adventures of Julian, Dick, Anne, George and Timmy the dog on their first holiday together at the seaside. In an old smugglers' cave, the children happen to overhear a radio message that refers to the abduction of George’s father Quentin. The professor has set up a laboratory on Kirrin Island where he’s doing research on a new energy generation method. Someone has obviously taken great interest in the valuable research results. But neither the police nor George’s mother Fanny believe the children. They are now on their own and discover a conspiracy that almost takes their breath away.
Valeria Eisenbart
as George
Neele-Marie Nickel
as Anne
Anja Kling
as Tante Fanny
Quirin Oettl
as Julian
Justus Schlingensiepen
as Dick
Anatole Taubman
as Agent Peter Turner
Michael Fitz
as Prof. Quentin
Armin Rohde
as Peters
Elyas M'Barek
as Vince
Johann von Bülow
as Hansen
Alwara Höfels
as Luna
Anna Böttcher
as Frau Miller
