Lily and Miki are going to Naakkala again! This means a new adventure awaits them with Grandma Agatha! In the town, preparations are in full swing for an important event - the opening of the house-museum of Irma Bryats! Irma is the most famous writer in Finland who disappeared many years ago. Nobody knows where she is. Of course, no one except Grandma Agatha! After all, Irma is her best friend. But what if Irma and her good name are in danger? After all, someone is weaving a cunning plan against her! Lily, Miki and their friends must stop the attacker!