Gong Minji is a 14 year old South Korean girl. At first sight she looked completly normal, but her life was a mess. She lost her parents when she was three, she gets bullied at school and her foster parents hate her. Someone who bullied her regulary was the one and only Lee Taemin. Little did he know he'd need her help in the future... One day she gets sick of it and ran away from home. As she was walking on the dark alleys of her neighborhood she saw a famliar group of people she always saw hanging around. They were her only chance and she asked to join their gang...

5 years later

Minji is now all grown up. She became a beautiful, y and dangerous young lady. Being a part of a gang was hard though. She had to learn how to protect herself from any attack. The gang wasn't a usual one though. They were "a good kind of gang". Their job was to help people and not harm them. And now that Minji was old enough she was going to be introduces to her first client. Lee Taemin...