May (Amanda Lee) returns from the States when she inherits her dead sister's flat but strange things start happening, like visitors being thrown out of windows, and she becomes convinced that the house is haunted. Thinking that the occurrences may be linked to her sister she decides the investigate the circumstances behind the death. Helping her is Fai, a clerk working for the firm of solicitors handling the inheritance and Michael, his friend. The two men soon find themselves rivals for May's attentions but both handle it in a good natured fashion and its this thread that lends the film its light nature. When the ghostly goings-on start to get out of hand the three turn to Yung (Simon Lui), an expert in the supernatural.

For the most part 'Sworn Revenge' plays like a light comedy and the first time the ghosts actually appear they bear more than a passing resemblance to Casper - certainly not scary at all. I can't really say that the film was all that gripping either and I don't expect it to be one of those movies that lingers long in the memory.

Things do get a bit more exciting in the last half hour when the ghosts start possessing people and Simon Lui is called upon to perform an exorcism. There is some use of special effects in this sequence which, despite the obvious low budget, do work quite well. Special effects are also employed when the ghosts first appear and while these aren't too bad, any attempt at suspense that follows is a lost cause. There are also a few moments where it looks as if the budget was getting a little tight and the effects look a bit lame. Still, spooky lighting and inventive camera angles can be just as effective and they are used quite well in the last 15 minutes or so.

Even though Simon Lui is probably the biggest star (he's the only member of the cast to have a biography included on the DVD), here he appears in little more than a supporting role but manages to make the most of it. Amanda Lee also seems to have fun with her role and is quite pleasant to watch.

Not the horror movie I was expecting but still a fairly entertaining, if instantly forgettable, distraction.