The final part of the cycle begun by the novels "Spotter. There will be no blitzkrieg!" And "Spotter. Stop the breakthrough!" Yegor Dotsenko and his assistants from the future practically coped with the task: the German Eastern Front is bursting at the seams. But to bring the victory closer for several more months, to change the course of several more operations means to save hundreds of thousands of lives. And Sergei Yakovlev, nicknamed Yul, an officer of the Marine Corps of the Russian Federation, enters a terrible game called "war." Sergei will take part in the desperate landings of the Soviet fleet and make a contribution to the capture of Constanta and Burgas, the Bosphorus and Dardanelles, Genholm, the Danish Straits and Peenemünde. Will his contribution to the common cause help to end the war ahead of schedule and finally change the history of the Soviet Union?