Story revolves around three sworn brothers namely Yu Hao, Shan Zi and Yang Xiong Qi. They are delinquents, fighting to gain what they want, though they have never officially joined any triads yet. Their leader Yu Hao falls for Xiao Yan Zi, who is the opposite of everything that the boys are. She is from a family with very good background and has a bright future as a budding pianist. An ambush on Yu Hao by a rival gang brings them together when Yan Zi saves Yu Hao.
So the story revolves around how they fall in love and how Yu Hao, in a bid to protect Yan Zi, ends up joining the triads in order to get protection.