Son Kale Hacibey is a historical action film that tells the story of a battle between the Turkish Ottoman Empire and the Ukrainian Hetmanate Empire on the one hand, and the Russian Empire on the other hand. The forces are fighting to gain control of the Hacibey Castle, an impenetrable fortress located on the Black Sea coast in the heart of Ukrainian Hetmanate Empire. And just when the Russians thought they were winning the battle against Ukrainians and Turks, a mysterious hero - a brave Ukrainian cossack warrior Andriy - arrives in Istambul to deliver a secret message from from Ukrainian Hetmanate Empire's leadership. A message that can forever change the course of this battle.

When the Soviet troops freed Ivan from the Nazi prison, he was charged with high treason and was facing long years in Siberian camps. Ivan did not want to die behind barbed wire or wait for an amnesty. Once he got an opportunity, he escaped from his camp. He was hunted high and low like the most wanted criminal and there was no place for him in the USSR. Based on the historical realities of those times, the film unfolds before the viewer a credible sequence of events that turned the Hero of the Soviet Union into a GULAG prisoner and then an Indian Chief. That is why the name Ivan Datsenko had to be changed for another - Firecrosser.

A small group of Russian soldiers with mixed skills are assembled to go on a covert mission to map out the area of Hitler's new HQ in the Ukraine known as Wehrwolf. But it's not until they get to their destination that the squads leader then decides to unveil the true details of the mission.