Jealousy wreaks havoc in this smart, unpredictable thriller. Pilot Gary Ellis (Christopher Eccleston), who suffers from chronic, degenerative heart troubles, is convinced his wife Tess (Kate Hardie) is having an affair. And eventually his constant suspicion and accusations drive Tess, a producer for a TV magazine program, into a sweaty liaison with one of her staff writers, Alex Madden (Rhys Ifans). His own manic obsessing in turn drives Gary to a massive heart attack, and only the fortuitous availability of a donor heart pulls him back from the brink of death. At first the transplant seems to give both of them a new lease on life, but their old troubles have only go...