Double Impact is a 1991 American action film written and directed by Sheldon Lettich, and written, produced by and starring Jean-Claude Van Damme in a dual role as Chad and Alex Wagner. The story begins with the opening of the Hong Kong Victoria Harbour tunnel by business partners Paul Wagner and Nigel Griffith (Alan Scarfe). Paul attends with his twin infant sons, Chad and Alex. However, after the celebrations, the family is followed home by a Triad hit squad on orders from Griffith and crime lord Raymond Zhang (Philip Chan). A shootout ensues, in which Paul and his wife are killed by Moon (Bolo Yeung), Griffith's henchman. Chad is rescued by the family bodyguard, Frank Avery (Geoffrey Lewis), and raised abroad. Alex is dropped off on the doorstep of a Hong Kong orphanage. In the present day, Chad (Jean-Claude Van Damme) and Frank are running a successful martial arts business in Los Angeles when Frank reveals a new "business" for the two of them in Hong Kong.