Kyiv high school student Yurko Turyanitsa has already solved the riddle of the Black Hand and defeated the Fire Serpent. But now he faces a much more dangerous enemy - the elusive White Raven. This is the name of a villain who preys on children on the Internet. The White Crow seeks out those who are not like others and drags them into his deadly nets. And she is helped, in particular, by the students of the First Model Gymnasium. Yurko must stop White Crow.