Agatha Christie's cherished housekeeper, Phyllida Bright, not only keeps the celebrated author's home running smoothly, but she has also proven herself an accomplished sleuth. So when a murderer brings mayhem to a wedding, in this USA Today bestselling series' latest installment, she's on hand to sweep up the mystery . . .

Phyllida is delighted to receive an invitation to the wedding of her friend Dr. John Bhatt. It's a chance to get to know his fiancée, Emily Hartparker, and to explore Coatesworth Manor—the grand seaside estate that belongs to Emily's distant relatives. Coatesworth is now managed by Lady Artemis Coatesworth and offers ample space for a celebration. But it's soon clear that some of the guests have intentions beyond cheering on the happy couple.

As is often the case when extended family gathers, there is bickering, not to mention an awkward love triangle between Emily's lovely cousin Lily, her handsome ex-husband Heath, and his new wife, Tibby. Besides that, some of the other cousins don't seem to get along.

And the drama gets infinitely worse when a wedding guest is discovered dead in the small chapel only hours after the ceremony.

Phyllida immediately agrees to help discover what happened, and brings some of her staff over from Mallowan Hall, Mrs. Christie's manor house, for cover. But with plenty of dark secrets and ugly family dynamics, it seems the killer could be any one of the Coatesworths—and that killer is dangerously motivated to keep the grisly truth from being revealed . . .