Wang Yunfei is actually an underground party member, and the music teacher is just his cover-up identity.
He practiced martial arts since childhood, attended Shanghai Mission School at the age of 16, joined the Communist Party at the age of 18, and was later sent to the "Dzerzhinsky Intelligence School" for further studies. After graduation, he became a member of the underground party.
After many years of absence, he returns to his hometown. What awaits him is a mysterious and thrilling secret battle in Bo Yun.
