Taeyeon is a class A-5 assassin, who has a special ability that can create an illusion through her eyes. Death awaits when you look at her eyes.
There are things that doesn't need an explanation. There are things that doesn't need a reason. There are things that doesn't need words. I work. I kill for a living. You want to know why? Because it doesn't matter. I am nobody. I exist just to kill–well that's what I only know for myself.