The Theory Of Flight is an engaging character study of an artist (Branagh) yearning to break free of boredom and mediocrity, and a terminally ill patient (Bonham-Carter) in the last stages of ASL, confined to a wheelchair, who desires to make love to a man before dying.Helena Bonham-Carter exudes wit, defiance, and independence as an ASL patient who is virtually dependent upon people around her to take care of her.Kenneth Branagh, sentenced through community service to take part in caring for her, complements Helena's charm with woeful melancholy, creating a sentimental, compelling love story in which two people try to help each other find the road to happiness, before time runs out.