Nowhere does Fanny feel as comfortable as in her Aunt Harriet's antique shop. How wonderful that she gets to spend her summer vacation there! But something is not right in the shop. Things disappear, freshly dusted furniture gets dusty again within seconds, and at night, there are constant rumblings and thumps heard from somewhere. Harriet acts as if everything is completely normal. But Fanny suspects that her aunt is hiding something from her - just like with the question of who Fanny's biological parents really are...