The king of a secret modern-time Medieval kingdom leaves his throne in inheritance to his son, who struggles to lead the kingdom in fight for its independence from the Italian state.
The Ciraulo family lives in the miserable district of Palermo called "Zen". When one of their children dies in a shootout between mafia gangsters they receive compensation and buy a luxury black Volvo. Things go wrong when Trancredi, another son, takes the car out and damages the car door.
When Nico returns from overseas to say farewell to his ailing mother, he discovers something monstrous is happening in the small town he once called home. As the list of grizzly murder victims begins to grow and the authorities fear the killer is a beast unlike anything they have ever seen, Nico senses a savage transformation within himself and uncovers the terrifying secret his family could never reveal.
