My superior sent me to get the antidote, thinking that I was his most obedient pawn.
The dead man had prepared a plan in advance and sharpened me into the final knife.
The people who were chasing us were only robbing but not killing, and my employer was actually a dead man. My colleague was lying in the basement, using his own body to hold the last key for me.
Everyone wants to use me up.
But when I walked into the delivery location with the antidote, Master's last words came to fruition:
"When you get it, your killer will be here too."
This time, I am the one who kills the enemy, and I am also the one who takes the upper hand.