Given the question: Build a movie plot around this: Why can't Frank kill Gianni? Gianni's death would render the antidote unusable
The answer is:
Frank Martin (Jason Statham) has relocated from southern France to Miami, Florida. As a favor, he becomes a temporary chauffeur for the wealthy Billings family. The marriage of Jefferson (Matthew Modine) and Audrey Billings (Amber Valletta) is under great strain due to the demands of his high-profile government job. Frank bonds with their son, Jack (Hunter Clary), whom he drives to and from elementary school in his new Audi A8 W12.[2] Later, a somewhat drunk Audrey shows up at Frank's home and tries to seduce him, but he tactfully sends her home.Frank prepares for the arrival of Inspector Tarconi (Francois Berleand), his detective friend from France, who has come to spend his holiday in Florida with Frank.When Frank takes Jack for a medical checkup, he realizes barely in time that impostors have killed and replaced the doctor and receptionist. A lengthy fight erupts between villains, led by Lola (Kate Nauta), and the unarmed Frank; which results in the death of one of the fake doctors. Frank escapes with Jack. Just as they arrive at Jack's house, he receives a phone call. The caller informs him that he and Jack are in the sights of a sniper capable of penetrating the car's bulletproof glass. Frank is forced to let Lola into the car; they speed away with Jack, shaking off many pursuing police cars.They arrive at a warehouse, where Frank meets Gianni (Alessandro Gassman), the ringleader of the operation. Frank is ordered to leave without Jack. He discovers an explosive attached to the car and succeeds in removing it prior to detonation. Jack is returned to his family after the payment of a ransom, but unknown to them and Frank, Jack has been injected with a deadly virus that will eventually kill anyone who the child breathes on.Suspected by everyone except Audrey of being one of the kidnappers, Frank tracks down the remaining fake doctor, Dimitri (Jason Flemyng), with Tarconi's assistance. Frank pretends to infect Dimitri with the same virus, then lets him escape. Dimitri panics and hurries to a lab to...