Nam Joo-hyuk

Wielding a light-up sword through the dark corners of a high school, a nurse with an unusual gift protects students from monsters only she can see.

The drama tells the story of a Metropolitan Investigation Team Unit tracking an organization called Vigilante, which judges the wicked people who escaped the law which has become a social phenomenon.

The story of Pil-Joo, an Alzheimer's patient in his 80s, who lost all his family during the Japanese colonial era, and devotes his lifelong revenge before his memories disappear, and a young man in his 20s who helps him.