A rogue soldier turned outlaw is thrust into a relentless fight with a corrupt sheriff, his obedient deputies, and a dangerous drug cartel in order to protect his sister and her young daughter.
When a crooked sheriff murders his employer, William "Billy the Kid" Bonney decides to avenge the death by killing the man responsible, throwing the lives of everyone around him into turmoil, and endangering the General Amnesty set up by Governor Wallace to bring peace to the New Mexico Territory.
In prohibition-era Chicago, the corrupt sheriff and Guy Gisborne, a south-side racketeer, knock off the boss Big Jim. Everyone falls in line behind Guy except Robbo, who controls the north side. Although he's out-gunned, Robbo wants to keep his own territory. A pool-playing dude from Indiana and the director of a boys' orphanage join forces with Robbo; and, when he gives some money to the orphanage, he becomes the toast of the town as a hood like Robin Hood. Meanwhile, Guy schemes to get rid of Robbo, and Big Jim's heretofore unknown daughter Marian appears and goes from man to man trying to find an ally in her quest to run the whole show. Can Robbo hold things together?
When a nature photographer explains to the Police how she fought her way out of the Watchatoomy Valley, they dismiss her crazed and violent story as a meth-induced nightmare. But when they discover that she's telling the truth, it's too late.