Lady Kiera Darby plans to spend the summer reconnecting with friends and family in anticipation of the betrothal of her beloved brother. But when a future in-law is implicated in a murder, the party takes a deadly turn. . . .

July 1833. Lady Darby and her dashing husband, Sebastian Gage, are settling into their newly renovated home at Bevington Park in Warkwickshire with their young daughter. With the breach between them and Sebastian’s father recently healed, they've agreed to help host a country house party for friends and family to share in their joy. Kiera is also anxious to help promote a match between her brother, Trevor, and the woman he’s fallen in love with, inviting her family to join them. However, Kiera swiftly discovers that the would-be bride’s family is not without their detractions. Her brother is unpleasant. Her mother is abrasive. And her father—the prosperous industrialist Jeremiah Birnam—is brusque, discourteous, and, at times, downright rude.

So when Mr. Birnam’s secretary is found murdered with Birnam standing over her body, many are content to allow him to take the blame. But neither Kiera nor Sebastian believes he did it, and in spite of his bluster and boorish behavior, they can’t let an innocent man be hung for another’s crime. Unfortunately, Birnam had his fair share of enemies at the house party, and any one of them might have struck out at his secretary in order to get to him. It's up to Kiera and Sebastian to uncover the truth and salvage Birnam’s reputation. As the couple slowly inches their way closer to the truth and threats emerge against their loved ones, Kiera begins to fear that the price of solving the crime may mean sacrificing her brother’s future happiness.