在这部五个朋友家庭片中,五位明星，George (VALERIA EISENBART), Julian (QUIRIN OETTL), Dick (JUSTUS SCHLINGENSIEPEN), Anne (NEELE MARIE NICKEL)和他们的狗Timmy一起去度假，在一个古代走私犯的洞中，他们发现了一个危险的密谋：有人要绑架George的父亲Quentin，由此开始了一段刺激的探险。
Quentin是一位教授，他在Kirrin岛上建立了一座秘密的实验室，并在那里进行新能源研究。但显然有人发现了他宝贵的研究成果！但是，警察或George的妈妈Fanny都不相信孩子们的话。有一天晚上，Quentin未能按照约定从灯塔上发回信号，五位朋友跟踪恶毒的绑架者去救Quentin。他们根据线索锁定两位野生动物摄影师和一位自称为政府特工的神秘游客。最后五位明星找到了海底的一条秘密通道，发现了一个他们难以置信的惊天阴谋……
The Famous Five Julian, Dick, Anne, George and Timmy (the dog) spend their vacation together, while George's dad (Professor Quentin ) is staying on a nearby island where he works on a project which might bring forward new methods of using alternative energies. But one day, he disappears and the five friends are soon convinced that he was kidnapped. Determined to rescue Professor Quentin, they not only have to deal with thugs and gangsters, but also uncover a huge conspiracy.
