The March of the Tin Soldiers

Twins Rusya and Lusha Raevsky could not even imagine that they could dive into the past. Moreover! It is now up to them to determine the victory of the Russian army over Napoleon. All this seems incredible and unimaginable, but... it is true.
Brother and sister find themselves in Moscow in 1812 and become not just observers of historical events but active participants! Now the victory of the Russian army over Napoleon depends a lot on them. A flight in a hot air balloon, a game of chess with the French emperor, candid conversations with Kutuzov, who has planned to outsmart the enemies, mysterious dungeons, ancient estates of Moscow, the retreat of the Russian army, the Moscow fire, the impending explosion of the Kremlin....
The homeland is in danger, and can one remain indifferent! Will courage and selflessness help the schoolchildren return home, to the future, or is their "dive" a one-way ticket?