They're all sharpening their knives. But only one of them stabbed him. Robert West has had five wives, but they've never all been in a room together - until now. Summoned to the ageing movie star's house in the Highlands, they expect a weekend of grandstanding and perhaps some clue about who will inherit his vast fortune one day. They don't expect Robert to announce that he's dying, and penning a memoir that will dish the dirt on each of his notorious marriages. The wives each seize on his offer to preview their chapter of the story. But after they've read the ruthless exposé, one of them decides not to stand for it - and soon Robert has a knife in his back. It may not be the most tearful murder scene, but now the police will get involved, the memoir will be entered into evidence, and no one wants that .

So the suspects strike a bargain to protect their secrets, and solve the case themselves.