In Chicago’s dangerous suburbs, skilled bounty hunters Irene "Rally" Vincent and "Minnie" May Hopkins operate Gunsmith Cats, a firearms shop of questionable legality. One day, Bill Collins, an agent with the Chicago branch of the Bureau of Alcohol, Tobacco, Firearms, and Explosives, blackmails Rally and May into assisting him on a case. The stakes are high, but Rally’s marksmanship and May’s expertise in explosives are unmatched. As Rally and May uncover the case’s secrets, the pair must rely on guns and grenades, outpacing, outmuscling, and outsmarting everyone else to survive.