In a future where Detroit’s most dangerous criminals occupy the city’s deserted brick mansions, an undercover cop joins forces with an ex-convict to defeat the notorious drug kingpin who has taken the mayor hostage. Detroit has fallen to crime, and in an effort to contain it, authorities have sealed up the inner city with a massive wall. Once you’re inside, you never get out. Lino (David Belle) is an ex-con who’s trying to make the best of life in this urban penitentiary when his girlfriend is abducted by ruthless drug lord Tremaine (RZA).