When the Blitz devastates her family, Violet must flee London and seek refuge in Cornwall, only to discover a hidden battle on the coast. Violet, reeling from the loss of her sister in London's bombings, relocates her nieces to the relative safety of Cornwall. There, she encounters Eva, a spirited chorus girl also escaping the capital's perils. Their lives intertwine with Hazel, a local woman involved with a secret military base near Porthcurno. As they uncover the base's clandestine operations, Violet and Eva realize Cornwall is not as safe as it seems, and they must contribute to the war effort. The narrative unfolds through a third-person perspective, focusing on the developing friendships and the challenges they face in wartime.

The Cornish Girls series has garnered significant praise from NetGalley reviewers and authors like Kitty Neale and Pam Weaver, with multiple five-star ratings. Readers consistently highlight the uplifting nature of the story, its engaging characters, and the compelling blend of light and dark elements. The writing is described as beautiful and charming, hooking readers from the start and leaving them invested in the characters' fates. The historical setting of World War 2 and the focus on female friendship during wartime are frequently cited as strengths, making it a highly anticipated series.