In a dystopian Detroit, the police have constructed a containment wall around abandoned brick mansions which have become home of an uncontrolled group of criminals led by the drug kingpin Tremaine, in order to isolate them and protect the rest of the city. By accident, an undercover cop Damien Collier and an ex-convict Lino who seem to never go the same way, team up to battle against Tremaine and prevent his sinister plot of destroying the entire city. But ultimately, Damien surprisingly figures out a shocking secret that the crime lord is not the most dangerous enemy he has to face…