Fun, fast and bullet-filled, Total Overdose is excellent fun. Author's review. 1989: Deep in the heart of the Mexican jungle, undercover agent Ernesto Cruz blasts his way through an armed militia to board a DEA plane bound for home. He never made it, the victim of an alleged 'overdose.' Present Day: After uncovering new evidence, Ernesto's son, Ramiro is set free from jail to join his twin brother Tommy, on the trail of their father's killer as they go on a tequila-fueled rampage through Mexico's gun-toting, drug-pushing underworld.