The Legendary Killer's Duo

Chapter 1: The Final Mission For over three decades, Samuel and Vincent were the most feared assassins in the underworld. Their names alone ended wars before they began, and no mission had ever remained unfinished. Now in their sixties, the legendary duo accepts what they believe will be their final assignment: infiltrate a classified underground laboratory and erase every trace of a secret experiment. The mission goes flawlessly—until Samuel accidentally shatters a mysterious experimental chemical. Dismissing it as nothing more than an unfortunate accident, the two complete their mission and return to headquarters, unaware that they have inhaled something that will change their fate forever. But instead of a hero's welcome, betrayal awaits. The organization they devoted their lives to has already decided they are no longer useful... And tonight, the world's greatest killers become the next targets.