This story is a continuation of the book “King Matius First”, the story of young Matius, who, having lost his royal parents early, was forced to take the throne of the king. Matiusz began his reign with reforms aimed at improving the lives of the people of the kingdom, primarily children. But, having no experience in government, Matiusz soon faced problems that he could not solve. There is a coup in the country, and the young king is deprived of power, moreover, he is prosecuted and exiled to a desert island. How will the future life of Matiusz - a kind, honest, noble boy, how many more hardships, hardships and troubles he will have to endure, by whom he will return to his country - victorious or defeated, read the book "King Matiusz on a desert island" .