Anthea and Maurice Linden's exploration of their family's history takes an unexpected turn during the early days of the pandemic, when Anthea impulsively orders a DNA test online. The results reveal a heritage quite different from what they had always believed, prompting Anthea to embark on a digital quest for the truth about her father's lineage.

Their investigation leads them to delve into news reports of their grandparents, Edward and Claire, who tragically passed away forty years earlier. Despite the official cause of death being reported as accidental poisoning, discrepancies in the records hint at a darker reality lurking beneath the surface.

As they sift through digital archives, Anthea and Maurice encounter troubling information about Josie, their grandparent's housekeeper, who raised their father after his parents' untimely deaths. Curious about Josie's connection to the poisoning, the siblings uncover puzzling clues that suggest Josie may have known more about the poisoning than she revealed to the police.

Their virtual journey takes them from the serene Irish countryside to the opulent surroundings of their grandfather's ancestral home, steeped in aristocratic history. Venturing further, they explore the historic streets of Montauban-sur-Mer in France, where their grandmother Claire's roots lie.

As their investigation deepens, they discover manuscripts authored by Edward which hint at historical scandals involving his own and Claire's families. With mounting evidence pointing towards foul play, Anthea and Maurice are determined to uncover the truth behind their grandparents' tragic demise.

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