A group of Russian border guards killed in battle on a mountain pass are resurrected several centuries later. People from the future entrust them with a strange mission - to go to the distant past, to the mid-sixteenth century, and obtain a casting captured by the Tatars - an artifact of mysterious destiny. The task seems simple for seasoned professionals, who are also armed to the teeth. But in the very first battle, Sergeant Andrei Matyakh understands that the usual AKMs and grenades are not the most reliable means against sabers and bows and that twentieth-century tactics are unacceptable in the battles of the era of Ivan the Terrible …