Evan Evans is a young police constable who has traded in the violence of city life for idyllic Llanfair, a Welsh village tucked far away from trouble. Nestled among the Snowdonia mountain range, Llanfair looks to Constable Evans like a town forgotten by time, but he quickly learns that even the bucolic countryside has its share of eccentric - and deadly - characters.

At the end of her first unsuccessful season out in society, Lady Georgiana has all but given up on attracting a suitable man - until she receives an invitation to a masked Halloween ball at Broxley Manor. Georgie is uncertain why she was invited, until she learns that the royal family intends to marry her off to a foreign prince, one reputed to be mad.

As the Great War continues to take its toll, headstrong 21-year-old Emily Bryce is determined to contribute to the war effort. She is convinced by a cheeky and handsome Australian pilot that she can do more, and it is not long before she falls in love with him and accepts his proposal of marriage. When he is sent back to the front, Emily volunteers as a “land girl,” tending to the neglected grounds of a large Devonshire estate. It’s here that Emily discovers the long-forgotten journals of a medicine woman who devoted her life to her herbal garden.

In 1944, British bomber pilot Hugo Langley parachuted from his stricken plane into the verdant fields of German-occupied Tuscany. Badly wounded, he found refuge in a ruined monastery and in the arms of Sofia Bartoli. But the love that kindled between them was shaken by an irreversible betrayal. Nearly 30 years later, Hugo's estranged daughter, Joanna, has returned home to the English countryside to arrange her father's funeral. Among his personal effects is an unopened letter addressed to Sofia. In it is a startling revelation.

World War II comes to Farleigh Place, the ancestral home of Lord Westerham and his five daughters, when a soldier with a failed parachute falls to his death on the estate. After his uniform and possessions raise suspicions, MI5 operative and family friend Ben Cresswell is covertly tasked with determining if the man is a German spy. The assignment also offers Ben the chance to be near Lord Westerham's middle daughter, Pamela, whom he furtively loves. But Pamela has her own secret.