Brotherhood. Envy. Wrath. Danger. Passion. There are many feelings that rule within the gangs of Seoul. Lim Aeri is a part of one of these gangs. Her father used to be the chief but once he was gotten rid of, she was dropped to the bottom of the gang hierarchy. Having to take care of both herself but also of her little sister, life in underground tunnels isn’t easy. She only has her unit standing behind her – until one day her chief sends her off to a mission; as an undercover bride in an enemy gang. Hesitantly Aeri enters the grounds of an enemy and suddenly a bunch of secrets unveil in front of her eyes – and not all of them are pleasant.