during the tang dynasty, king jian li yong and the treacherous prime minister ma lifu took advantage of the emperor's critical illness to put crown prince li chun under house arrest, control the government, and intend to plot a coup. general lin yan of jinwu guard and chief of the nine gate chen li were involved in this bizarre vortex. lin yan had to take the risk alone, and used her superb martial arts to rob the prison and rescue the trapped prince overnight.
