A London couple is invited by a friendly but pushy American widow she met on vacation. Unfortunately, they only have to google the last background when the unwanted guest arrives. It turns out that he may not be just an annoyance, as thought until now, but something more dangerous. A crazy scramble for survival and external decency begins.

The first play of the well-known British TV screenwriter (“Sherlock”) follows the high-standard conventions of English humor.