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, retreating to a life of endless partying-made possible by the massive fortune she's inherited. 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 bedrest, Cinnamon flies to her sister's side, where she's temporarily living at The Savoy. Immediately swept away by the beauty and history of the legendary hotel and its famed American Bar, Cinnamon finds ample opportunity to distract herself. 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.

After meeting a handsome historian researching the hotel and realizing that Ada is likely to be once again overlooked, Cinnamon must decide if she can overcome her demons and stand up for Ada's story. And, along the way, she might just save her own story too.