August 1942. Fierce battles are underway on the approaches to Stalingrad. The bombings are intensifying. All transport hubs and corridors are under attack. Tension is growing. Bandit groups have become more active, German saboteurs are at work. Svetlana Elagina and Egor Shilov are sent to help the military prosecutor's office. But upon arrival in the city, a group of prosecutor's investigators is blown up right before their eyes. Now Elagina and Shilov will have to not only identify a group of saboteurs who are always one step ahead, but also solve a series of various crimes. Elagina herself will also be under suspicion. After all, the main enemy is hiding among his own.