I am looking for maps for Heroes III.

Does anyone know of any Russian maps with a well-developed plot and preferably without a long period of army building?

I can't guarantee the translation, but you can try this: http://www.maps4heroes.com/forum/opinions.php?game=3&map_id=700

The plot is huge there. Just read the chapters when you need to do them according to the plot (with the hero with the Astral portrait).