1933 Korea is a country under Japanese military occupation. Many resistance fighters were exiled in China. Now they are trying to organize, to strike from distance. Resistance has found that the highest commander of the Japanese army will visit Korea. They decide to try his assassination, but the only hitter that can perform such a mission is Ahn Ok-yun which is locked in a prison in Shanghai. Yem resistant agents Sek-jin goes to seek her release and his comrades, but the plan is sabotaged from within by a traitor. Now, Ok-yun and fighters they just escaped from Chinese but also to face the Japanese army which includes a special assassin whose mission eliminate it.