A cop is losing the control of his right hand and cannot pull the trigger on time anymore. Before any accident happens, he decides to resign. Meanwhile his friend and informer is brutally murdered in Malaysia. Before leaving the force, he decides to find the killers with the help of his buddy, a young cop and an inspector from Kuala Lumpur.

Twins, separated at birth, end up as a Hong Kong gangster and a New York concert pianist. When the pianist travels to Hong Kong for a concert, the two inevitably get mistaken for each other.