You don’t need any “accidents” to change history. And we need a talented gunsmith who will make his way to Peter the Great with his revolutionary inventions. Accurate shooting from a screw fusée during the siege of Narva makes such an impression on the tsar that he rewards the master with the rank of officer and orders the hasty production of new rifled weapons. Will the designer have time to fulfill the highest order and train selected rifle units of the Russian guard for the Battle of Poltava? Will the weapons revolution prevent the Prut disaster? Will Peter the Great's rifles be able to speed up the course of history?..