Soulcatcher

A military contractor hired to seize a weapon that turns people into savage killers seeks revenge when his brother falls victim to the device. "Kiel" used to work for Polish services fighting terrorism, and now he is a mercenary acting on behalf of a private military company. Together with his brother Piotr, he accepts a lucrative mission in a country ruled by a local warlord. Although the task seems simple, it turns out that they have to face a dangerous experimental weapon.