Envey is famous throughout the world for its crystal clear waters and thermal springs. Then one day the water turns fluorescent green and it seems like a sinister figure from the past may be behind it. It is up to the town's science officer Doc Sztok, his son Csabi, and his best friend Nini to save the day - but more may be at stake than the reputation of Envey - the fate of the whole world may be on the line!
In a second adventure, what at first seems to be a simple power surge leads intrepid 12-year-old investigators Izzy and Owain on a journey into the past of Sandfoot Bay, and to a long-forgotten history that is threatening to stir to life!