Septiembre was part of Martello Paz's death squad sent to kill Felix Monatero. Septiembre and several other mercenaries assisted Paz as he stormed the Supremo Hat Company building. While Paz's group attacked the building from the front, Septiembre and his team assaulted the rear entrance of the building as Septiembre drove an SUV. Septiembre and his group of mercenaries had killed a few gunmen when a gunner within the building's loading bay revealed himself, manning a .50-caliber machine gun. While Fierro managed to jump out the vehicle, Septiembre, Sancho, and Ramon were cut to pieces by the machine gun. (Storm Force)