The center of the story is Colonel Elisha "Lesha" Protasov, a man with a difficult character. He is involved in the investigation of particularly important cases. Elisha Protasov earned the nickname "Lesha" due to his unusual name and stern nature. However, his enemies call him "Fox." Protasov serves as an investigator in the regional prosecutor's office. He is known for his uncompromising nature, stubbornness, and insightfulness. Elisha Protasov could have been the embodiment of an ideal man if it weren't for his difficult personality.