Snake Deadly Act (1980)

Kwok Chung, a privileged young man who often gets into trouble, becomes involved in a dangerous game of deception when he meets Yueh, the master of Snake Fist. As Kwok learns the lethal art from Yueh, they seem to form a bond of respect and friendship. But this friendship turns dark as Kwok discovers Yueh has been secretly manipulating his life in a complex plot that includes betrayal and the murder of Kwok's family. In this suspenseful story of deceit and survival, Kwok Chung must face difficult choices and confront the darker side of those he trusted. As the danger increases and more people die, Kwok realizes that even in a world of deadly martial arts, the greatest threats can come from those closest to you.