Six years ago, Cinnamon Scott was a young writer on the rise in New York City. But since the sudden loss of her parents, she's been stuck in place. Despite their tragic loss, she and her older sister, Rosemary, have always had each other to lean on. But now, with Rosie living in London and about to give birth to twins, Cinnamon feels more lost than ever. When Rosie is put on bed rest, Cinnamon flies to her sister's side, where she's temporarily living at The Savoy. She’s immediately swept away by the beauty and history of the legendary hotel and its famed American Bar. When the late-shift bartender tells her the story of Ada Coleman, the woman who crafted the cocktail recipes The Savoy popularized in its famous handbook a century ago, Cinnamon is inspired by the bartender's vivid stories of Ada's fearlessness and can't understand why Ada's name is nowhere to be found.