House Willow has a tradition of passing down martial arts only to men, but Colleen Willow, passionate about martial arts, secretly learned the Iron Fist technique. For years, she hid her skills, seen by her family as a useless woman. When a formidable enemy defeated the Willow masters and the family faced ruin, Colleen could no longer stay silent. She revealed her strength, shocking everyone as the most talented fighter and the sole heir to the family's secret techniques.