School No. 13. The Immortal Director

Not long ago, Darina, Yaric, and Marat solved their first case — and now school No. 13 throws them their next mystery! This time it all starts at the city museum. Where else can one obtain information about the old mansion that surely hides countless treasures? The guys did not expect that right in the museum they would become witnesses to a mysterious incident… And a theft! The mystery hunters from school number thirteen are in for a new investigation!