1452 Byzantium collapses under the onslaught of Ottoman warriors, who take advantage of the weakness of Emperor Constantine. Saving the mysterious beauty Yamina from death, the ruler almost died and is now bedridden. The capital is under siege. But suddenly, under the walls of Constantinople, the brave Scottish warrior John Grant appears. He promised the teacher to find and save his only daughter. The search for a mysterious stranger leads to the imperial palace. It turns out that his teacher’s daughter is Yamina, Konstantin’s fiancée. The brave Scot is ready for anything, but still does not know what secret ties connect him with the emperor himself and the fatal beauty...