On the day that Rose receives an invitation to apprentice with the twin Exceptional Pastry Chefs Antine and Nadine in the Svalbard Archipelago, the magical pastry shop is ransacked. What could the criminals have been looking for? Is the Bliss family now in danger? And how is all this related to Lucy's disappearance? Rose doesn't know where to start, as she has to show her best during her apprenticeship while the challenges at home keep growing. But could the solution to all her problems be on the other side of the world, where she will learn to prepare perhaps the most dangerous sweets she has ever made: the chocolate Squares of the Dark Shadow? The ninth adventure of the beloved series will keep you on the edge of your seat until the very last moment.