There is a strange scent wafting through the old villa. It smells of a thousand different things. It is the first thing Luzie notices about her new home. Yet the smells lead nowhere, and the key Luzie finds under a floorboard does not fit into any lock. Could the villa contain a hidden room? Together with her little brother, Benno, and the boy next door, Mats, Luzie starts to search the house. When they stumble into the hidden part of the villa, they can hardly believe what they see: Shelves up to the ceiling hold countless perfume bottles with iridescent and bubbling contents! Yet the bottles are not only full of surprises but they also contain a danger that has been concealed for a long time. And it should better have stayed locked away forever.

The series sold more than 363,000 copies, translation rights sold to BE/NL, BG , CZ, DK, FI, GR, LT, RO, RU, SK, UA and German audio book rights sold.