This story takes place in a small peaceful suburb where we are introduced to Kalle, also called Master Detective Blomquist. Him and his two friends spend their time annoying the two old rich ladies in town, Auntie Hilda and Auntie Hulda as well as the local officer Mr Rask. Then one day, two villains decide to kidnap one of the Aunties in order to get a ransom. Stupidly they choose the strict Auntie Hilda, which causes a right palaver until the Master Detective Blomquist and his friends tackle the unfortunate villains and sort everything out nicely.