This starts out as a typical Agatha Christie vehicle - even the heroine is called Agatha - she has a romantic partner called Iris. Her sister invites a bunch of so called friends to her yacht and faces them with all the bad stuff they had done to her. The problem is that nothing much happens after that. Unlike the Christie vehicles where everyone is killed and there is a twist at the end - this doesn't happen. There is ridiculous explanation about the colour violet and it's meaning - totally bizarre. The policeman of course - has to ask Agatha for her help in discovering who shot one of the...