The young girl Nie Yiyi (played by Jiang Luxia) was originally a martial arts coach. Due to the accidental death of her father, she was discouraged and left the martial arts team. Later, she was introduced by her childhood friend Zhong Tian (played by Li Canchen). With her excellent skills, Nie Yiyi became the personal bodyguard of Hong Kong tycoon Mr. He (played by Zhang Zhaohui). However, the good times did not last long. Soon Mr. He and his wife were abducted by a group of unidentified masters. Nie Yiyi was defeated in a hard fight and began to pursue Mr. He's whereabouts with Zhong Tian. Unexpectedly, she was soon inexplicably involved in a series of underground fights. Mr. He, who escaped by chance, brought the whole story: it turned out that one of Mr. He's business partners was the mastermind behind the online gambling group, and Mr. He was hijacked because he refused the other party's cooperation. Nie Yiyi's outstanding performance attracted the attention of the gambling group. In order to rescue Mr. He who was abducted again, Nie Yiyi had to continue fighting... and the truth of the matter was far from simple as imagined.