July 1833. Lady Darby and her husband, Sebastian Gage, are settling into their newly renovated home at Bevington Park in Warkwickshire with their daughter. With the breach between them and Sebastian's father healed, they've agreed to help host a country house party. 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 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. Unfortunately, Birnam had his fair share of enemies at the party, and any one of them might have struck out at his secretary. 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.