The plot seems somewhat contrived, and the malevolence shown by the perpetrators (including the Master of the college) towards the son of a Japanese war criminal seems to rather stretch the imagination. Moreover, one of the conspirators, the female professor Jane, seems to be remarkably cold-blooded for an apparently rather nice woman. How Morse can still feel sentimental towards her right at the end of the movie is difficult to comprehend. He should be congratulating himself for a lucky escape and having a good drink, not taking her a bunch of flowers in hospital.
But what really gets my goat about this film is the sheer sloppiness and ignorance of the writer in naming the Japanese character "Yukio Li". There is no such Japanese surname as Li. Chinese or Korean, yes, but Japanese, no. If the writer wanted an archtypical Japanese name (rather than archtypical Chinese or Korean, as Li is), why didn't he go for something like Nakamura or Watanabe? It's surprising that no-one else involved in the production picked up on this ridiculous mistake.