The thrilling and fantastic story of three Prague children, Alena, David, Ondra, and the charismatic treasure hunter Aaron Cohen, takes us to the most mysterious places of old Prague, to the ruins of an old water castle, and among strange creatures from ancient times... All of this takes place during an exciting and adventurous search for a mysterious treasure, the Golem, and the legendary Philosopher's Stone...

A young boy is forced to live with a chimney-sweeper family and be his apprentice after his parents death. Even though he is good chimney-sweeper and hard working, he would rather be a pastry cook like his late father.