Save the Last Bullet for me

"Save the last bullet for me" is the last line of the oath of the United Nations Strategic Security Department (UNSSD)‘s Special Operations, a phrase too familiar to Sean, officially designated Artemis 9, one of the members of Squad Artemis, elite supersoldiers that form the tip of the spear of the UNSSD--- that is, until his mistake caused the death of his teammate and he retired from service. Suddenly, he is given a second chance to re-enlist. Torn between his self-hate and the call of duty, will this jaded veteran fulfill the oath he had sworn?