The series “Girl Detective Agatha Mystery.”

Endowed with amazing instincts and a phenomenal memory, Agatha Mystery dreams of becoming a writer. But that’s in the future, but for now she’s just an excellent detective! Together with her hapless cousin Larry, a detective school student, she travels the world to solve the most perplexing mysteries. And they are helped by a devoted butler, a mischievous Siberian cat and many eccentric relatives.

The Smugglers Code Larry certainly cannot be called an excellent student. Why is he an excellent student - if things continue like this, he faces expulsion from detective school. There is an urgent need to improve his disastrous assessments, and for this Larry is assigned another investigation. The owner of a luxury Berlin hotel was stolen... the most ordinary volcanic stone! It would seem, why would a robber covet a penny's worth of loot? The owner of the missing stone contacted Oko International only because she valued it as a memory of her father. A team of detectives led by Agatha and Larry, following the trail, soon finds out that the victim’s father had a far from rosy past. And that in reality the stolen stone is only part of a very long story about a cunning code, the Berlin Wall and old friendship...