1942. In the suburbs of Riga, the Nazis organize a training center to eliminate major party leaders and senior officers of the Red Army. The training of saboteurs was entrusted to the former Soviet colonel Grunov. Upon learning of this, Stalin personally orders the destruction of the Center and the delivery of Grunov to Moscow for an open trial of the traitor. The task was entrusted to the group of Major Maxim Shelestov. He rejects the command's offer to openly break into the territory of the training base - too risky. The major has his own, daring and unusual plan for this dangerous operation...