This detective trio takes on any mystery! For all fans of Stranger Things and The Three Question Marks.

The friends Caspar and Bob are on the trail of a mysterious secret. Someone seems to be crossing animals, plants and technology to create dangerous hybrid beings. Are the secret agents behind this who are on the heels of Caspar and Bob? Together with the scientist Doc, the boys follow the clues into the desert outside Las Vegas. But there lurks an even greater, eight-legged danger. You have little time to defeat the giant, lightning-spitting beasts. Because soon the whole city will be overrun by them.