In the second book of this adventure series, Csabi and Nini have won the school award for science, and their prize is to spend time working at a museum in Budapest. But in the shadows of the museum lurks a figure from the past. The youngsters delve into the rituals of an ancient and far-off civilisation to help them try to defeat a dangerous plan to control the weather.
Meanwhile, in a second story, Izzy and Owain are spending their holidays on the beautiful and historic Pyr Island. But the island holds many mysteries and the children discover that the island’s famous chocolate owes its delicious flavour to an unusual and dangerous supplier!