Four present-day Russian men dig for Nazi memorabilia at a WWII battlefield. A wormhole lake sends them back to a battle in 1942 USSR.

Two young Russian historians are going to Ukraine to take part in the reconstruction of the Lvov-Sandomierz operation in July 1944. On sight they fall into conflict with Ukrainian nationalists, and some magical twist of fate, move into the middle of real warfare from more than 60 years. Miraculously avoiding death at the hands of Ukrainian nationalists, caught in the middle of fighting between the Red Army and the Nazis.