Nigel and Max are two successful murder-mystery playwrights - or at least they were. Now they're financially up against it and in desperate need of a blockbuster hit.
Wracking their brains to come up with a plot that hasn't been used before, the duo arrive at a startling realisation - they are probably the most qualified people in the country to plot a real murder!
What is more, the fact that Nigel's nagging wife is insured for £200,000 suggests that there may be an alternative way to capitalise on their professional skills.
As long as they kill the right person and avoid being investigated by a policeman who knows all their plots inside out, they should be OK.