Lieutenant Colonel of the Security Service of Ukraine (SBU) Andrey Ivanovich Shevchenko is sent in July 2014 for another rotation to the ATO zone in the east of the country. This time he is traveling as a senior member of the SBU group to Mariupol, where pro-Russian sentiments are strong and which Kyiv intends to suppress by any means. Local citizens are arrested for wearing a St. George ribbon in a car, for a post on social networks, for talking in transport... At the Mariupol airfield where the contingent is stationed Kyiv security forces begin to operate a secret prison, which is called the “library”. People who end up there simply disappear from life. Some - forever. In addition to official structures, volunteer battalions "Dnepr", "Azov", "Shakhtersk" are rampant in the city, which are engaged in kidnappings, extortion, rape, murder and torture of the local population. The problem is that. that Andrei Ivanovich works for Russian intelligence and must transmit important information to the Center. And so that suspicion does not fall on him, he must be one of the Ukrainian security forces, including the murderers and marauders from the volunteer battalions. And this turns out to be a very difficult task for an experienced intelligence officer. Contains obscene language