Antonina Ostapchuk is on the verge of a life-changing decision. She is getting married and saying goodbye to her job as an investigator forever. There is only one last case left. Under mysterious circumstances, the head of admissions at the Lensk Hospital has been murdered. The woman led a modest life and had no bad habits, except for one weakness: she loved chocolate. A poisoned chocolate bar was waiting for her in an ordinary grocery store. How could the killer have calculated who would get that particular chocolate bar? This tangled story, which began many years ago, proves fatal for many—including Tonya herself.
