Gamekeeper

The man known only as Brock lives a quiet existence as gamekeeper on a secluded Scottish estate. The tranquility is disrupted when Russian paramilitary mercenaries storm the estate and kill Jonah Morgan -— Brock’s friend and owner of the estate. To avenge Jonah’s death and protect a secret equation, Brock must turn predator and journey deep into an unfamiliar, urban underworld. Throughout his journey, he is plagued by a dark past and his son's death