1921. Having fled from the Crimea, Wrangel, having concentrated his army on the Bulgarian coast, is preparing a landing force and counts only on the support of the counter-revolutionary underground hiding in Rostov. Captain Filatov falls into the hands of the Red Army soldiers, who is "arranged" to escape with the help of Chekist Bakharev. Filatov, together with his "savior", finds himself at the center of a secret organization preparing a senseless rebellion.