The body of businessman Greg Stavisky was discovered at the Emerald Meadows Memorial Museum in Los Angeles. For help in solving the crime, local authorities turned to Russian expert Oleg Potemkin, who was visiting his friend in the United States. Oleg soon found out that not long before, a unique exhibit, the Antioch Cup, had been stolen from the museum, and the murdered man was directly related to the crime. But such a daring theft is beyond the capabilities of one person. It turns out that the museum’s valuables are entangled in a criminal network? The detective never imagined that he would find the answer to his main question in... the suicide note of the next victim.