Amos Walker knows Detroit, from the highest to the lowest, and that includes the gangs of Mexicantown. When a friend asks Walker to get his son's brother-in-law out of one of two feuding gangs, Walker gets in trouble fast. First, dead bodies start to pile up; then come suspicious fires and the bottle bombs. Walker is caught in the middle of a gang war. Whether or not a middle-aged gringo like him can cool things off between the Maldados and the Zapatistas, he's got to try; he did promise his friend. Once he gets involved, he realizes there's something else going on; the specter of an international conspiracy threatens to make this local trouble blow sky-high. And if he ends up dead or in jail for murders he didn't commit, he might have to put that promise on hold. It's tough being Amos Walker.