"The hour will come, after the assault on the village of Dada-Yurt, as two guys from the future will bring you. They are those linemen..." - General Yermolov significantly completed. Zaur Kochesokov and Vasily Barloga looked at each other in bewilderment. Could two of our contemporaries, students of the history department of a prestigious Moscow university, know that fate will send them to the very heat of the Caucasian wars of the nineteenth century? And now they are obliged to reveal the secret of the Line, where Russians and Caucasians disappear without a trace, where Black Abreks walk on three-legged horses, where flying genies incinerate a person with one look, and steel falcons are able to pierce Chechen chain mail with their beaks... If not for the old plastun grandfather Eroshka and his granddaughter, shooting from two hands, our students would have disappeared on the first day. And here... "We'll mix such a thing that come, godfather, admire!"