Atakan is a bloody boulder, a giant granite block, on which pagans sacrificed human sacrifices for centuries. A group of student historians, led by a young teacher, descend into the dungeons of St. Petersburg to find the legendary stone. With each step, the situation gets out of control, only death awaits them. The attack craves new blood. Who will survive?
Young prince Aleksandr has to hold out against two enemies - the Horde in the east and the Teutonic order and Sweden in the west. He discovers that some boyars are plotting against him and are ready to betray Novgorod to the Swedes and the Germans to boost their trade. Meanwhile, his best friend falls under suspicion, as somebody tries to poison the young prince at his own wedding feast. Aleksandr has no way out - to defend his people against the invaders and to find the true poisoner.
