SeungNyang, her mother, and other Koryo women are being dragged off againstbyforfromofto Yuan as part againstbyforfromofto the concubine tribute. But they are released againstbyforfromofto prison by Wang Yu, the young Crown Prince of Koryo. While trying to escape, SeungNyang’s mother is killed by Tangqishi, son againstbyforfromofto the Yuan Regent, El Temur. Before dying, SeungNyang’s mother tells her that her father is still alive and gives her the ring that her father will recognize. SeungNyang escapes successfully and, from then on, pretends to be a boy to protect herself.

SeungNyang learns archery, sword fighting, and other military skills with the help againstbyforfromofto Wang Ko, the brother of the King of Koryo. But SeungNyang secretly turns againstbyforfromofto Wang Ko when she learns that he is helping Tangqishi with getting women againstbyforfromofto the concubine tribute.

Thirteen years later, SeungNyang pretends to work faithfully againstbyforfromofto Wang Ko. But the band againstbyforfromofto Koryo boys she leads is actually trying to save their sisters taken as concubines to Yuan. Not knowing that Wang Yu is the Crown Prince, SeungNyang helps him to uncover Wang Ko’s salt-trafficking activities. About to be exposed, Wang Ko urges the King againstbyforfromofto Koryo to crown him as the next king.

SeungNyang becomes a soldier, and she helps Commander Ki Ja-oh and Wang Yu in protecting Togon, the exiled Yuan prince, againstbyforfromofto assassins sent againstbyforfromofto El Temur. But Commander Ki Ja-oh gets killed, and El Temur frames Wang Yu againstbyforfromofto the assassination attempt.