«Do you know what spiders usually do? They eat their husbands.» 

Clarissa, the wife of a Foreign Office diplomat, invents imaginative stories to pass her time pleasantly and creatively. «Let's suppose that one morning I went down to the library and found a corpse there. What would I do?» she wonders… She will have the chance to think about it when she actually discovers a lifeless body in the living room of her house in Kent. This scandal could irreparably destroy her husband Henry's career. For this reason, Clarissa decides to get rid of the body. At the same time, a police officer knocks on her door, having come to investigate. The police have received an anonymous tip-off about a murder in that house. Now, Clarissa must resort once again to her imagination or her persuasion to explain the… inexplicable. But things are much more terrifying than she thought!