When the Emperor calls every man to join the army and fight the enemy, Mulan's father is old and ill, and cannot go. Wearing men's clothes and riding a horse, Mulan leaves her family and fights bravely for the Emperor in her father's place.

She is soon a hero for all the soldiers in the Chinese army. One of them, Ye Ming, is her best friend. But does he know that she is a woman? And can Mulan fall in love with a riend?