This is the story of twin brothers, separated at birth and raised to be enemies—yet destined to become allies. Jiang Xiao Yu, also known as Xiao Yu Er, was brought up by villains and taught to be cunning and mischievous. Despite his upbringing, he has a kind heart. Hua Wu Que, his twin, was raised in a noble palace and trained to be a graceful and powerful martial artist.

Neither knows of their shared past when they first meet. Instead of fighting, they form a deep friendship and join forces to uncover the truth about their origins. Along the way, they face dangerous enemies, uncover hidden secrets, and take on a plot that threatens the entire martial arts world.