Edgar 'Lefty' Mendieta can't believe his luck. An old flame has returned to Mexico with a son he knew nothing about - it seems that a happy family life is finally beckoning for our careworn hero. The only snag is that Jason Mendieta wants to follow in his father's footsteps... Meanwhile, the war that is raging between Mexico's drug cartels takes on a renewed fury. The lover of Samantha Valdes, the head of the Pacific Cartel, is murdered in her hotel bedroom, and Valdes' unquenchable thirst for revenge unleashes a wave of killings across the country. Lefty is preoccupied with another pressing matter - some lunatic has taken to bumping off dentists with a heavy calibre pistol - but a personal connection with Valdes sees him drawn into her investigation. The truth behind her lover's murder will underline that old adage: revenge is a dish best served cold.