British humor is distinctly different from American humor and this film illustrates that point nicely. American humor hits you with a sledgehammer, with outrageous gags and extremely explicit content. British humor is full of innuendo, irony and subtlety. It is thoughtful wit, full of `aha!' moments. This is why Americans often refer to British humor as being dry, mostly because we don't like pondering over our comedy. We prefer a guffaw to a good snicker.
In this film, Karen (Helena Bonham Carter) and Henry (Sam Neill) meet one night on a bridge where they both went to commit suicide. Henry is interrupted from jumping by the cries of Karen who has botched her attempt. After he saves her, they commiserate and decide that getting revenge would be better than committing suicide. They make a pact where each of them agrees to even the score for the other with their respective objects of contempt.
Karen becomes a secretary to Henry's old boss (Steve Coogan) and proceeds to make his life a living hell, convincing his wife he is having an affair. Henry's target is Imogen (Kristen Scott Thomas), whom Karen hates because she stole her husband back from Karen, with whom he was having an affair. The film is replete with highbrow humor that you would only see in an English film. There is plenty of class-warfare comedy poking fun at the aristocracy.
Helena Bonham Cater is brilliantly droll as the diabolical Karen. She is deliciously evil as she cunningly plots Bruce's demise. Long known as a terrific dramatic actor, Bonham Carter shows here that she can convert that energy into an intensely offbeat and funny character with equal impact. Sam Neill is also entertaining as Henry, a bumbling victim of fate who allows himself to be swept along by circumstances. Kristin Scott Thomas does a superb job of portraying Imogen, a woman steeped in affectation and arrogance, who ultimately becomes a casualty of love.
This highly entertaining film requires a certain refined sense of humor to enjoy. I rated it an 8/10. It will lack punch for the average viewer, but for the viewer who enjoys subtlety and irony it will be amusing and enjoyable.