Gyun-woo is having difficulty forgetting the sassy girl. He then reunites with his childhood sweetheart, an elementary school classmate from China who was often teased about her broken Korean. They marry despite family opposition, and Gyun-woo has no idea what marriage has in store for him.

Set in the Joseon Period, three beautiful musketeers fight against a powerful group who tries to overturn the royal family and gain absolute power. The leader of the Beautiful Three Musketeers is Jin-Ok (Ha Ji-Won), a smart and righteous woman. Hong-Dan (Gang Ye-Won) is the only married woman among the three women. Ga-Bi (Son Ga-In) is the youngest among the musketeers and excels at fighting.