Heejin holds the title for the worlds greatest supervillain. A psychopath and pure evil, she will obliterate anyone who gets in her way.

Jinsol, who is also a supervillain, is infatuated and obsessed with Heejin. She would take extreme measures just to make Heejin her lover.

Jungeun is an assassin on a mission to kill Heejin. Sooyoung is an ordinary girl who suddenly finds out that Heejin is her half sister and is responsible for ruining her life, so she seeks revenge.

Different girls with different motives, one goal in mind. Who will survive?