Key Jin

An 18-year-old skater boy, Cheng Fei, discovers his half-sister, He Sheng, whom he never knew, and gradually unravels a family secret that has been hidden for years.

The film tells the story of an 11-year-old girl, Dada, who suffers from psychological distress and troubles due to a sudden change in her family situation, leading to emotional depression and withdrawal, ultimately forcing her to drop out of school. Her mother has no choice but to send her to live temporarily at a horse ranch run by her cousin.

After growing up in a mountain stronghold created to oversee the martial arts world, Zhou Fei finally sets out to explore life beyond its walls. On her journey, she reunites with the enigmatic Xie Yun, and together they navigate a world of danger, secrets, and adventure across the martial arts realm.