Bangtan, a mafia gang, a force to reckon with. Their power and ruthlessness whisper among the underworld, the fear of them ran deep in both worlds, no one dare to mess with them. Hiding their mafia identity by their successful and widespread businesses. Y/N, totally opposite of Bangtan, a normal girl in a normal world not much aware of the darkness of underworld. What will happen when two opposite personalities, two opposite world collide?