In 1920s England, private detective Henry Fleming is visiting his friend, retired author Lily Riley, in the quintessentially English village of Fulbridge. Tragedy strikes when a resident is murdered, stabbed through the heart, in the historic local church. When an inexperienced Scotland Yard detective arrives to investigate the case, Lily is accused of the terrible crime. With no sign of a murder weapon, and no obvious motive, Fleming realises it will fall to him to prove his friend's innocence and solve the baffling case.

December 1927. Mystery-writer Marius Quin has one previous bestseller, endless looming mortgage payments, and no idea how to write his next book. When his childhood friend Lady Isabella Montague invites him to an intimate New Year’s Eve party hosted by a narcissistic actor, Marius seizes upon the distraction. With his perpetually glum Basset hound along for the ride, he navigates the snowy lanes to the opulent estate of Everham Hall. As the celebrations begin, fireworks light up the sky, champagne corks pop, and then the host is murdered…

Miss Busby helped Major Heathcliff Lennox solve a series of murders at Bloxford in the Cotswolds. Now, she finds herself drawn into a new murder, but this time, it's just her, and she must rely on her sharp mind and sharper wits to catch a Cotswolds killer, along with a handsome police inspector and a reporter who's keen to make her mark.

The Christmas trees in Knightsbridge sparkle with festive joy, and there’s nothing more fun than Christmas cocktail parties to ring in the new year of 1922. Camille Divine, known as Lady Camille Divine, has decorated her little house in Birdcage Mews with glistening decorations and a beautiful Christmas tree, but she has more on her mind than the festive season.

Rex and Dora face their most difficult puzzle yet. First, they have to uncover the real identity of the victim. Only then can they determine who had the motive to kill. But in the Eternal City, the past and present are intertwined. Old flames return, past grudges re-emerge, and regrets bring consequences. Before the case ends, they'll have to answer a riddle. What is more important—solving the case or saving the life of a friend?