Zippo (Mark Cummings) and his sister Nelly (Alex Stead)live a feral lifestyle where school is an option and their drunken father Les (Tony Howard)shows little interest. However, when they find a badly injured dog, whom they name Carlos, a ray of light appears in their otherwise dark existence. Upon nursing Carlos back to health Nelly and Zippo decide to keep him. However, when the town's underbelly take a keen interest in Carlos , Zippo realizes he has a race against time to save him being dragged back in the brutal underworld he has only just escaped from.