Donald and Isabelle have a form of autism called Asperger's Syndrome. Donald, a good-natured but hapless cab driver has a knack for numbers. He falls head over heals in love with the beautiful but complex Isabelle when she joins the autism support group he leads.

Julian Noble is an unshaven, unnerved and unpredictable freelance assassin, who happens to encounter desperate businessman Danny Wright in the bar of a modern Mexico City hotel. Danny is intrigued when Julian reveals that he's a "facilitator of fatalities," and his wife becomes equally fascinated when Julian shows up unexpectedly, six months later, at Danny's home in Denver. Having lost his touch as a reliable hit-man, Julian needs Danny's help with...