In a forest near the Ukrainian capital, a video game developer leads a platoon of soldiers braving freezing temperatures to hunt Russian drones that are terrorising the country.
For two months, Vladimir Putin's forces have hammered Ukraine's power grid with mass drone and missile strikes, leaving millions without electricity, heating or running water as a bitter winter sets in.
The country is reeling from a devastating new wave of air strikes which have forced emergency power cuts nationwide and killed several civilians including a one-year-old boy.
