The protagonist of the series "Uroven ugrozy" is retired agent Martynov of the Federal Anti-Terrorist Service. A year ago, he left the service after a terrible incident. Someone made an attempt on his life, resulting in Martynov being injured and his wife and daughter killed. Unable to come to terms with the loss, he decides to return to work. Martynov hopes to track down the person who ruined his life. Meanwhile, another terrorist attack occurs in the city. The hero realizes that the event is somehow connected to his past.