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.

In the footsteps of the diamond Larry Mystery has a new unexpected hobby - he suddenly decides to get a dog. After all, this is a great way to meet a young aristocrat who is walking her poodle in the park near the Tower. And then a restless puppy named Sherlock appears in Larry’s house, who does not give his owner a moment’s peace. And besides, you have to take the dog on your next business trip - after all, the team of detectives urgently flies to Amsterdam. Agatha and Larry must investigate the mysterious disappearance of a rough diamond of unprecedented value. The clock is ticking: as soon as the criminal gives the diamond for cutting, a treasure worth half a million pounds sterling will disappear forever. And, who knows, maybe it’s the dog’s instinct that will help the detectives pick up the trail of the diamond...