Sergey, owner of a small IT company, dies in an accident and finds himself in the world of Ancient Rus’. A world where ancient spirits of rivers, fields, and forests live alongside people — mermaids, leshys, and water sprites. All typical transmigrators turn into humans, but only not Seryoga. He manages to become an incorporeal spirit of a stream that flows into the river Lovat.
Depression, despair, and fear are not his thing! He starts fighting for his place in the sun, gradually transforming from a light wisp into a mighty spirit wielding magic of water and light.
On the way to success, he meets a silent wise man, Volokh; the wise Vedaing Mother; falls in love with the mermaid Kupava; and battles undead creatures—still not knowing that the goddess Mokosh herself has planted a divine spark in him so that he becomes the Defender of Yav.
«Defender of Yav» is Slavic fantasy with sharp, toothy humor, dynamic battles, and unexpected philosophical depth. For those who believe that even in the body of a spirit, you can remain human.