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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 Sword of the King of Scotland

Dunnottar Castle is home to the sword of Robert the Bruce, the legendary king of Scotland. This precious relic is to be shown to the public for the first time. However, during the opening ceremony of the exhibition, all those present are overcome by sleep, and when they wake up, they discover that the sword has disappeared!

Exploring ancient dungeons and battling evil ghosts, the brother and sister Mysteri intend to solve this mystery at all costs...