At the heart of the story is Yevheniia Marchuk, a 25-year-old detective with the Kyiv police. Intelligent, principled and courageous, she works with a sense of duty and is considered one of the most promising officers in her department. Following an incident during the arrest of criminals, which her superiors interpret as an abuse of authority, she is unexpectedly given a new, far more complex assignment. On the instructions of a senior official at the Ministry of Internal Affairs, she is to travel undercover to Odessa, where, according to Interpol, an international smuggling ring dealing in stolen jewellery may be operating. Finding herself in a world of art, collectors and influential clients that is new to her, Yevgeniya unravels the complex web of secrets step by step.