Set in the Joseon era, Knight Flower is an action-comedy drama starring Lee Ha Nee as Jo Yeo Hwa, a woman who has lived a quiet and modest life as a virtuous widow by day for 15 years. However, she is secretly leading a double life: at night, she valiantly sneaks out to help and take care of those in need.
Pil Jik fails his mission to take Nan Kyung's life and tries to flee. Ji Sung decides to remove Yeo Hwa before she finds out more about his plot. Also, he threatens the King with the Queen Dowager's safety. Meanwhile, Su Ho discovers that Ji Sung's son came back alive.