BAT and Dani are given the mission of clipping members of the Canzio family. As they take out one wiseguy after the other they are put on the trail of a copy-cat serial killer. On the way to discovering who the killer is BAT turns Nell, a body builder, who joins the team. More than any of the BAT series, BAT, The Paisani Vampire, tells the true story of the undead and the culture of the vampire.