When Jason Betelli told his best friend Luke Mills he would be spending the first six days of the school holidays with his Father on Dark-Water Island, and that Luke and their friend Julie Kostas were invited. Luke was doubtful it would be a fun time. For a start MacDonalds and KFC were certein to be missing. Luke saw a huge potential for six days of boredom. What could you do on an Island? When Julie agreed to come, Luke reluctantly gave his Ok. With Jason missing he would not have much to do at home anyway. Little did they know, the trio, otherwise known as the kid detectives, were on their way to their biggest adventure yet. Secret doors and passages, deep underground tunnels, Crooks out to blackmail entire Countries for millions of dollars, were part of what was to come. Luke could not have been more wrong about boredom on the Island. Once again the kids curiosity, observance skills, and ability to uncover clues, would set them on a dangerous and hair-raising path of conflict with villians.