The female swordsman Aruka possesses superb swordsmanship and uses her agility to eliminate any enemy that stands in her way. The death of Master Hong made her start this "destined revenge". Master Hong's enemy is a witch named Qin Yijue, who is cold-blooded, murderous, and can control the mysterious magic power - turbid air at will. Aruka was raised by the "Blade Clan" since she was a child. This organization composed of killers wiped out Aruka's feelings and trained her into a killing machine, whose only mission is to complete the "work". If we talk about ruthlessness, Aruka and Qin Yijue are equally matched. During the journey, Aruka met three female heroes. Qiu Xiangyu, who is good at singing, dancing and martial arts, Chen Suer, a gunsmith who loves alcohol, and Hua Wuhen, the female leader of the thieves group. The three were tied together by a wonderful marriage, and after going through hardships, they finally realized the Hongmen Road mentioned by Master Hong. What is the Hongmen Road? How will Aruka's life change?