When her gang lord father of YG was murdered in a shoot out by a rival gang, SM, Naul loses her home, her name, and everything she has. A decade later, SM has taken over the whole of Korea, and Seoul is ruled over by a cruel dictatorship.

Naul has become a mercenary, paid to kill and use her explosives knowledge to quietly lead the resistance against SM. Meanwhile, rebel groups use her skills, pay her, and let her go on her way.

However, she has only one goal. To find her father's killer. She only saw him once.

She will find him whatever it takes.

And when she finds him, she will kill him.