There are two types of people with special abilities: villains, who are driven by their wicked desires, and heroes, who pursue justice and oppose villains.
Cassian Lee is a highly powerful psychologist with a kind heart. But one day, when he visits his friend in Greece, everything takes a different turn. After a series of unexpected events, Cassian finds himself in the body of a Korean high school student... just turned into a villainous character!
Will his sense of justice ultimately prevail, or will he become a cold-blooded villain?
"You have to become a greater evil to fight against true evil!"
Cassian dies after being accused of killing a teammate. Just when he thinks it's all over for him, his soul is transferred into a boy... A renowned Psyker, top-ranked, envied by all, turns into a villainous character overnight.