Biker Svyatoslav Rusov, caught on the way by bad weather, decided to leave the highway and wait out a thunderstorm in the nearest fishing line. Lightning strike, flash in eyes and... Rusov's consciousness is transferred many centuries ago and merges with the consciousness of the sixteen-year-old prince Svyatoslav Igorevich from the family of Rurik, the son of the famous princess Olga. 10 century. Slavic tribes on the verge of the formation of a single state. But they are not destined to cross this threshold - instead of uniting against common external enemies, the tribes will begin to quarrel and quarrel over minor grievances, incited by agents of the Khazar Khaganate and the Byzantine Empire. Will the young prince be able to create a powerful state and fight back against impudent neighbors? Will Svyatoslav be able to defeat the Khazars, Romans, Vikings and Pechenegs, using only his ingenuity and courage of Russian soldiers?