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Given an amazing sense of smell and a phenomenal memory, Agatha Mystery dreams of becoming a writer, but that's in the future. For now, she is a great detective! Together with her simple-minded cousin Larry, a student at a detective school, she travels the world solving the most intricate mysteries. They are assisted by a loyal major, a naughty Siberian cat, and a lot of strange relatives.

The Quest in New York

Larry is preparing to celebrate Christmas with his family. But then he is suddenly sent to New York to attend the prestigious International Detective Congress. The young man will compete for the Holmes Cup with peers from the world's leading detective schools. Larry, Agatha, Mr Kent and Watson the cat arrive in New York, where they are joined by another Mystery - Kim's uncle. It would seem that they can forget about criminals, because it is a competition for detectives. However, no one knows that this year's Great Catch will be a cover for the crime of the century...