In the streets of Paris, mysterious blue circles drawn with chalk appear, with various objects inside, as if they were forgotten items left by someone. Commissary Adamberg, unlike others, senses a hidden meaning in these drawings. His fears are confirmed when, one day, a corpse is found in the center of one such circle. This plot forms the basis of Fred Vargas’s debut novel, in which Commissary Adamberg—known for his intuition and unconventional thinking—takes on the case. Vargas’s books, where Adamberg is the main character, have received international acclaim and earned many awards, including prestigious prizes in different countries.