Housekeeper Phyllida Bright is quite in her element at Mallowan Hall, the charming English manor that she keeps in tip-top shape. By contrast, the bustling metropolis of London, where her famed employer Agatha Christie has temporarily relocated, leaves Phyllida a bit out of her depth. Not only must she grapple with a limited staff, but Phyllida also has to rein in a temperamental French cook who has the looks of Hercule Poirot, but none of the charm.

When a man named Archibald Allston is found dead in an armchair onstage at the Adelphi Theater, first impressions are that he died of natural causes. But the very next day, the unlucky actor playing Benvolio at the Belmont Theater is found with his head bashed in. And when a third victim turns up, this time with double-C initials, the fatal pattern is impossible to ignore.

With panic erupting among theater folk—a superstitious bunch at the best of times—Phyllida steps up to help with the investigation. The murderer's MO may be easy to read, but can Phyllida uncover the killer's identity before the final curtain falls on another victim?