A high-school underdog, Yuan (Kai Ko), intervenes to help a homeless man on his way home-only for both to get beaten up. The bloodied vagrant claims to be Huang Jun (Leon Dai), a once-great warrior now weakened and recovering. When Yuan gets home, still flashes on how bad the day has been, the homeless man appears outside his 4th-floor window, leaving a cryptic demand: “Make Me Your Master.”

Yuan recruits his buddy, Ah-yi (Barent Zhu), to pledge themselves as Huang’s disciples. They learn how to defy gravity, dancing across eaves and walls, and harness inner qi to shatter stone walls.

They also discover the grievances between Huang and his fellow junior disciple, Lan Jin (Liu Kuanting), 500 years ago. At first, Yuan and Ah-yi revel in their newfound power-playing heroes, righting petty wrongs with fists and flair. But their idealism cracks as brutal killings stain the city’s shadows – Lan Jin, now a demon king, is awakening. A storm of blood looms, and with it, Yuan uncovers the big secret behind “Kung-Fu”……