Shi Wuqi, an orphan, chose his own name, simply because his code name in the organization is "457"!
Shi Wuqi's organization is a mysterious assassination organization that specializes in adopting orphans from around the world and subjecting them to brutal training with a death elimination system. Only one out of a hundred can survive the fifteen-year training period.
Although Shi Wuqi has "graduated" for two years, he has only completed three "assignments." Not because of his low completion rate, but because he only took on these three "assignments"! It's not that he doesn't want to take on more assignments, but his speed of completion is extremely slow. For tasks with a "time limit," the organization simply doesn't assign them to him.