Jung Eun Mi is a woman who is part of a gang from downtown Seoul, and works under the name of Rocket. Chief Park Chang Beom along with his field agents Bang Yongguk and Kim Himchan, from NIS (National Intelligence Service), are commissioned to dismantle the group. When Chief Park is shot, Agent Bang takes over the investigation and is willing to do everything to revenge his Chief. In the middle of so much action and drama will love have a role in this story?