Dying, the grandfather bequeathed to his grandson Luke to faithfully and truly serve the hero Vamekh, who, according to popular belief, should come and free the country from the oppression of the bloodthirsty vizier. Princess Twalta is also waiting for Vamekh's arrival - she must convey to him a family secret - a treasure, thanks to which Vamekh will become invulnerable. However, the vizier's mercenaries kidnap her from the monastery where Twalta was hiding. Luka, his friends, Bakur and Zaal, save the princess, but they themselves find themselves in an enemy trap. In the old abandoned fortress they will have to fight their last battle.